Patent Publication Number: US-2023159135-A1

Title: Motorized component and control system of human-powered vehicle

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims priority under 35 U.S.C. § 119 to German Patent Application No. 10 2021 130 990.5, filed Nov. 25, 2021. The contents of German Patent Application No. 10 2021 130 990.5 are incorporated herein by reference in their entirety. 
     BACKGROUND 
     Technical Field 
     The present invention relates to a motorized component and a control system of a human-powered vehicle. 
     Background Information 
     A human-powered vehicle generally includes an electric device powered by an electric power supply. Such an electric device can include its own power supply. However, if the human-powered vehicle includes a plurality of electric devices which are respectively powered by a plurality of power supplies, it is hard for a user to manage the plurality of power supplies. It is preferable to share an electric power supply having greater capacity with a plurality of devices. 
     SUMMARY 
     In accordance with a first aspect of the present invention, a motorized component of a human-powered vehicle comprises an electric actuator and controller circuitry configured to control the electric actuator. At least one of the electric actuator and the controller circuitry is configured to be electrically connected via an electric cable to a remotely located power source configured to supply electricity to an assist drive unit configured to assist pedaling. The motorized component is other than a rear derailleur. 
     With the motorized component according to the first aspect, it is possible to share the remotely located power source with the assist drive unit. Thus, it is possible to collectively manage a power source used for the motorized component and the assist drive unit. 
     In accordance with a second aspect of the present invention, the motorized component according to the first aspect further comprises wireless communicator circuitry electrically connected to the controller circuitry. 
     With the motorized component according to the second aspect, it is possible to omit an electric cable provided between the motorized component and another component. 
     In accordance with a third aspect of the present invention, the motorized component according to the second aspect is configured so that at least one of the electric actuator, the wireless communicator circuitry, and the controller circuitry is configured to receive electricity from the remotely located power source via the electric cable. 
     With the motorized component according to the third aspect, it is possible to share the remotely located power source with the assist drive unit. Thus, it is possible to collectively manage a power source used for the motorized component and the assist drive unit while omitting an electric cable between the motorized component and another component. 
     In accordance with a fourth aspect of the present invention, the motorized component according to the second or third aspect is configured so that the controller circuitry is configured to control the electric actuator based on a control signal wirelessly transmitted from master wireless communicator circuitry of a master electric device. 
     With the motorized component according to the fourth aspect, it is possible to wirelessly operate the motorized component using the master electric device. 
     In accordance with a fifth aspect of the present invention, the motorized component according to the second or third aspect is configured so that the wireless communicator circuitry is configured to wirelessly transmit a slave control signal to slave wireless communicator circuitry of a slave device to control the slave device. 
     With the motorized component according to the fifth aspect, it is possible to wirelessly operate the slave device via the motorized component. 
     In accordance with a sixth aspect of the present invention, the motorized component according to any one of the second to fifth aspects further comprises a connection port to which the electric cable is configured to be detachably and reattachably connected such that the connection port is electrically connected to the at least one of the electric actuator, the wireless communicator circuitry, and the controller circuitry. 
     With the motorized component according to the sixth aspect, it is possible to connect the remotely located power source to the motorized component via the connection port. 
     In accordance with a seventh aspect of the present invention, the motorized component according to any one of the first to sixth aspects further comprises a first member, a second member movable relative to the first member, and a positioning structure configured to adjustably position the first member and the second member relative to each other. 
     With the motorized component according to the seventh aspect, it is possible to apply the structure of the motorized component to a device that is preferable to adjustably position two members relative to each other. 
     In accordance with an eighth aspect of the present invention, the motorized component according to the seventh aspect is configured so that the positioning structure is configured to position the first member and the second member relative to each other in a lock state and configured to allow the first member and the second member to move relative to each other in an adjustable state. The electric actuator is configured to actuate the positioning structure to change a state of the positioning structure between the lock state and the adjustable state. The controller circuitry is configured to control the electric actuator to actuate the positioning structure. 
     With the motorized component according to the eighth aspect, it is possible to apply the structure of the motorized component to a device that is preferable to have the lock state and the adjustable state. 
     In accordance with a ninth aspect of the present invention, the motorized component according to the seventh or eighth aspect is configured so that the first member extends in a longitudinal direction The second member extends in the longitudinal direction. The first member and the second member are movable relative to each other in the longitudinal direction. The positioning structure is configured to position the first member and the second member relative to each other in the longitudinal direction in the lock state and configured to allow the first member and the second member to move relative to each other in the longitudinal direction in the adjustable state. 
     With the motorized component according to the ninth aspect, it is possible to apply the structure of the motorized component to a device that is preferable to adjustably position two longitudinal members relative to each other. 
     In accordance with a tenth aspect of the present invention, the motorized component according to any one of the first to sixth aspects is configured so that the electric actuator is configured to control a restriction state of a restriction structure configured to restrict a travel of the human-powered vehicle. 
     With the motorized component according to the tenth aspect, it is possible to restrict a wheel from locking up while the restriction structure restricts the travel of the human-powered vehicle, for example. 
     In accordance with an eleventh aspect of the present invention, a control system of a human-powered vehicle comprises the motorized component according to any one of the second to sixth aspects and a master electric device including master wireless communicator circuitry configured to wirelessly transmit the control signal to the wireless communicator circuitry of the motorized component. 
     With the control system according to the eleventh aspect, it is possible to wirelessly operate the motorized component using the master electric device. 
     In accordance with a twelfth aspect of the present invention, the control system according to the eleventh aspect is configured so that the master electric device includes a user interface configured to receive a user input. The master wireless communicator circuitry is configured to wirelessly transmit the control signal based on the user input received by the user interface. 
     With the control system according to the twelfth aspect, it is possible to wirelessly operate the motorized component based on the user input received by the master electric device. 
     In accordance with a thirteenth aspect of the present invention, the control system according to the twelfth aspect is configured so that the user interface includes a switch configured to be activated in response to the user input. 
     With the control system according to the thirteenth aspect, it is possible to receive the user input with a simplified structure. 
     In accordance with a fourteenth aspect of the present invention, the control system according to any one of the eleventh to thirteenth aspects is configured so that the master electric device is configured to be electrically connected to an electric power source configured to be remotely located from the remotely located power source. 
     With the control system according to the fourteenth aspect, it is possible to supply electricity to the master electric device using the electric power source in a case where the master electric device is not electrically connected to the remotely located power source. 
     In accordance with a fifteenth aspect of the present invention, the control system according to the fourteenth aspect is configured so that the master electric device includes a power-source holder configured to hold the electric power source. 
     With the control system according to the fifteenth aspect, it is possible to attach the electric power source to the master electric device via the power-source holder. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings. 
         FIG.  1    is a side elevational view of a human-powered vehicle including a control system in accordance with a first embodiment. 
         FIG.  2    is a schematic block diagram of the control system for the human-powered vehicle illustrated in  FIG.  1   . 
         FIG.  3    is a schematic block diagram of the control system for the human-powered vehicle illustrated in  FIG.  1   . 
         FIG.  4    is a schematic block diagram of the control system for the human-powered vehicle illustrated in  FIG.  1   . 
         FIG.  5    is a schematic block diagram of a control system in accordance with a second embodiment. 
         FIG.  6    is a schematic block diagram of a control system in accordance with a third embodiment. 
         FIG.  7    is a schematic block diagram of a control system in accordance with a fourth embodiment. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     The embodiment(s) will now be described with reference to the accompanying drawings, wherein like reference numerals designate corresponding or identical elements throughout the various drawings. 
     First Embodiment 
     As seen in  FIG.  1   , a human-powered vehicle  2  includes a frame  2 A, a saddle  2 B, a handlebar  2 C, a front fork  2 D, a drive train  2 E, a front wheel W 1 , a rear wheel W 2 , a restriction structure BD 1 , a restriction operating device BD 2 . The restriction structure BD 1  includes a brake unit BD 11  and a brake unit BD 12 . The restriction operating device BD 2  includes a brake operating device BD 21 , and a brake operating device BD 22 . The front fork  2 D is rotatably mounted to the frame  2 A. The handlebar  2 C is secured to the front fork  2 D. The front wheel W 1  is rotatably coupled to the front fork  2 D. The rear wheel W 2  is rotatably coupled to the frame  2 A. 
     The restriction structure BD 1  is configured to restrict a travel of the human-powered vehicle  2 . The restriction structure BD 1  is configured to apply a braking force to the front wheel W 1  in response to an operation of the brake operating device BD 21 . The restriction structure BD 1  is configured to restrict a travel of the human-powered vehicle  2 . The restriction structure BD 1  is configured to apply a braking force to the rear wheel W 2  in response to an operation of the brake operating device BD 22 . The brake operating device BD 21  is connected to the restriction structure BD 1  via a hydraulic hose BD 31 . The brake operating device BD 22  is connected to the restriction structure BD 1  via a hydraulic hose BD 32 . The restriction structure BD 1  can also be referred to as a brake device or structure BD 1 . 
     In the present application, a human-powered vehicle is a vehicle to travel with a motive power including at least a human power of a user who rides the human-powered vehicle (i.e., rider). The human-powered vehicle includes a various kind of bicycles such as a mountain bike, a road bike, a city bike, a cargo bike, a hand bike, and a recumbent bike. Furthermore, the human-powered vehicle includes an electric bike (E-bike). The electric bike includes an electrically assisted bicycle configured to assist propulsion of a vehicle with an electric motor. However, a total number of wheels of the human-powered vehicle is not limited to two. For example, the human-powered vehicle includes a vehicle having one wheel or three or more wheels. Especially, the human-powered vehicle does not include a vehicle that uses only an internal-combustion engine as motive power. Generally, a light road vehicle, which includes a vehicle that does not require a driver&#39;s license for a public road, is assumed as the human-powered vehicle. 
     The human-powered vehicle  2  comprises a control system  10 . The control system  10  for the human-powered vehicle  2  comprises a motorized component and a master electric device. In the first embodiment, the control system  10  comprises a motorized component AS, a motorized component SS, a motorized component AB, a motorized component FD, and a motorized component LE. The control system  10  comprises a master electric device MD 1 , a master electric device MD 2 , a master electric device MD 3 , a master electric device MD 4 , and a master electric device MD 5 . 
     The motorized component AS is configured to change a height of the saddle  2 B relative to the frame  2 A. The motorized component AS is configured to be mounted to the frame  2 A. The motorized component AS can also be referred to as a rider-posture changing device AS or an adjustable seatpost AS. 
     The motorized component SS is configured to absorb and/or damp shock and/or vibration from a road surface. The motorized component SS is configured to be mounted to the front fork  2 D. The motorized component SS can also be referred to as a rider-posture changing device SS or a suspension SS. 
     The motorized component AB is configured to control a restriction state of the restriction structure BD 1  configured to restrict a travel of the human-powered vehicle  2 . The motorized component AB is configured to restrict the front wheel W 1  and/or the rear wheel W 2  from locking up during braking. The motorized component AB can also be referred to as an anti-lock braking device AB. 
     The motorized component LE is configured to emit light. The motorized component LE can also be referred to as a light emitter LE. 
     The master electric device MD 1  is configured to operate the motorized component AS. The master electric device MD 2  is configured to operate the motorized component SS. The master electric device MD 3  is configured to operate the motorized component AB. The master electric device MD 4  is configured to operate the motorized component FD. The master electric device MD 5  is configured to operate the motorized component LE. However, a total number of the motorized components is not limited to five. A total number of the master electric devices is not limited to five. 
     In the present application, the following directional terms “front,” “rear,” “forward,” “rearward,” “left,” “right,” “transverse,” “upward” and “downward” as well as any other similar directional terms refer to those directions which are determined on the basis of a user (e.g., a rider) who is in the user&#39;s standard position (e.g., on the saddle  2 B or a seat) in the human-powered vehicle  2  with facing the handlebar  2 C or a steering. Accordingly, these terms, as utilized to describe the control system  10 , the motorized component  12 , or other components, should be interpreted relative to the human-powered vehicle  2  equipped with the control system  10 , the motorized component  12 , or other components as used in an upright riding position on a horizontal surface. 
     The drive train  2 E includes a rear derailleur RD, the motorized component FD, a crank CR, a front sprocket assembly FS, a rear sprocket assembly RS, and a chain C. The motorized component FD can also be referred to as a gear changing device RD or a front derailleur FD. The front sprocket assembly FS is coupled to the crank CR to rotate relative to the frame  2 A along with the crank CR. The rear sprocket assembly RS is rotatably mounted to the frame  2 A. The chain C is engaged with the front sprocket assembly FS and the rear sprocket assembly RS. The rear derailleur RD is mounted to the frame  2 A and is configured to shift the chain C relative to the rear sprocket assembly RS to change a gear position. The motorized component FD is mounted to the frame  2 A and is configured to shift the chain C relative to the front sprocket assembly FS to change a gear position. However, the motorized component FD can be omitted from the drive train  2 E if needed and/or desired. 
     The human-powered vehicle  2  includes an assist drive unit DU configured to assist pedaling. The assist drive unit DU includes an assist motor DU 1 . The assist motor DU 1  is configured to apply an assist driving force to the drive train  2 E. Thus, the assist drive unit DU can also be referred to as an assist drive structure DU. 
     In the present application, the motorized components AS, SS, AB, FD and LE are different components from the rear derailleur RD. Each of the motorized components AS, SS, AB, FD and LE does not include the rear derailleur RD and the assist drive unit DU. Each of the motorized components AS, SS, AB, FD and LE is other than the rear derailleur RD and the assist drive unit DU. Thus, the control system  10  includes the motorized components AS, SS, AB, FD and LE other than each of the rear derailleur RD and the assist drive unit DU. 
     The human-powered vehicle  2  includes a shift operating device MD 6  and an assist operating device MD 7 . The shift operating device MD 6  is configured to operate the rear derailleur RD. The assist operating device MD 7  is configured to operate the assist drive unit DU. 
     As seen in  FIG.  1   , the human-powered vehicle  2  includes a remotely located power source RPS. The remotely located power source RPS is configured to supply electricity to the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU. The remotely located power source RPS includes a battery RPS 1  and a battery holder RPS 2 . The battery RPS 1  is configured to supply electricity to the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU via the battery holder RPS 2 . The battery holder RPS 2  is coupled to the frame  2 A. The battery holder RPS 2  is configured to detachably and reattachably hold the battery RPS 1 . The battery RPS 1  is configured to be detachably and reattachably connected to the battery holder RPS 2 . The remotely located power source RPS can be at least partially provided in the frame  2 A if needed and/or desired. 
     The control system  10  includes a wired communication structure WS. The remotely located power source RPS is electrically connected to the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU with the wired communication structure WS to supply electricity to the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU. For example, the wired communication structure WS includes at least one electric cable. 
     As seen in  FIG.  2   , the motorized component AS for the human-powered vehicle  2  other than the rear derailleur RD comprises an electric actuator AS 1  and a controller AS 2  configured to control the electric actuator AS 1 . Examples of the electric actuator AS 1  include a motor. 
     At least one of the electric actuator AS 1  and the controller AS 2  is configured to be electrically connected via an electric cable EC 1  to the remotely located power source RPS configured to supply electricity to the assist drive unit DU configured to assist pedaling. In the first embodiment, each of the electric actuator AS 1  and the controller AS 2  is configured to be electrically connected to the remotely located power source RPS via the electric cable EC 1 . However, only one of the electric actuator AS 1  and the controller AS 2  can be configured to be electrically connected via the electric cable EC 1  to the remotely located power source RPS if needed and/or desired. 
     The motorized component AS further comprises a wireless communicator WC 1  electrically connected to the controller AS 2 . The wireless communicator WC 1  is configured to wirelessly communicate with another wireless communicator of another component via a wireless communication channel. The controller AS 2  is configured to receive a control signal from another component via the wireless communicator WC 1 . The controller AS 2  is configured to receive a control signal CS 1  from the master electric device MD 1  via the wireless communicator WC 1 . 
     At least one of the electric actuator AS 1 , the wireless communicator WC 1 , and the controller AS 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 1 . In the first embodiment, each of the electric actuator AS 1 , the wireless communicator WC 1 , and the controller AS 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 1 . However, only one or two of the electric actuator AS 1 , the wireless communicator WC 1 , and the controller AS 2  can be configured to be electrically connected via the electric cable EC 1  to the remotely located power source RPS if needed and/or desired. 
     The controller AS 2  includes a processor AS 21 , a memory AS 22 , a circuit board AS 23 , and a system bus AS 24 . The processor AS 21  and the memory AS 22  are electrically mounted on the circuit board AS 23 . The processor AS 21  includes a central processing unit (CPU) and a memory controller. The memory AS 22  is electrically connected to the processor AS 21 . The memory AS 22  includes a read only memory (ROM) and a random-access memory (RAM). The memory AS 22  includes storage areas each having an address in the ROM and the RAM. The processor AS 21  is configured to control the memory AS 22  to store data in the storage areas of the memory AS 22  and reads data from the storage areas of the memory AS 22 . The memory AS 22  (e.g., the ROM) stores a program. The program is read into the processor AS 21 , and thereby the configuration and/or algorithm of the controller AS 2  is performed. The controller AS 2  can also be referred to as a controller circuit or circuitry AS 2 . 
     The wireless communicator WC 1  is electrically mounted on the circuit board AS 23 . The wireless communicator WC 1  is electrically connected to the processor AS 21  and the memory AS 22  with the circuit board AS 23  and the system bus AS 24 . The wireless communicator WC 1  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the wireless communicator WC 1  can also be referred to as a wireless communicator circuit or circuitry WC 1 . 
     The wireless communicator WC 1  is configured to superimpose digital signals on carrier wave using a predetermined wireless communication protocol to wirelessly transmit a control signal. In the first embodiment, the wireless communicator WC 1  is configured to encrypt a control signal using a cryptographic key to generate encrypted wireless signals. 
     The wireless communicator WC 1  is configured to receives a wireless signal via the antenna. In the first embodiment, the wireless communicator WC 1  is configured to decode the wireless signal to recognize the control signal CS 1  wirelessly transmitted from the master electric device MD 1 . The wireless communicator WC 1  is configured to decrypt the control signal CS 1  using the cryptographic key. 
     As seen in  FIG.  2   , the master electric device MD 1  includes a master controller MC 1 . The master electric device MD 1  includes a master wireless communicator MW 1 . The master controller MC 1  is electrically connected to the master wireless communicator MW 1 . The master wireless communicator MW 1  is configured to wirelessly transmit the control signal CS 1  to the wireless communicator WC 1  of the motorized component AS. The controller AS 2  is configured to receive the control signal CS 1  from the master electric device MD 1  via the wireless communicator WC 1 . The controller AS 2  is configured to control the electric actuator AS 1  based on the control signal CS 1  wirelessly transmitted from the master wireless communicator MW 1  of the master electric device MD 1 . 
     The master electric device MD 1  includes a user interface UF 1  configured to receive a user input U 1 . The master wireless communicator MW 1  is configured to wirelessly transmit the control signal CS 1  based on the user input U 1  received by the user interface UF 1 . The user interface UF 1  is electrically connected to the master controller MC 1 . The master controller MC 1  is configured to control the master wireless communicator MW 1  to wirelessly transmit the control signal CS 1  in response to the user input U 1 . In the first embodiment, the user interface UF 1  includes a switch SW 1  configured to be activated in response to the user input U 1 . The switch SW 1  is electrically connected to the master controller MC 1 . However, the user interface UF 1  can include other structures instead of or in addition to the switch SW 1 . 
     The master controller MC 1  includes a processor MC 11 , a memory MC 12 , a circuit board MC 13 , and a system bus MC 14 . The processor MC 11  and the memory MC 12  are electrically mounted on the circuit board MC 13 . The processor MC 11  includes a CPU and a memory controller. The memory MC 12  is electrically connected to the processor MC 11 . The memory MC 12  includes a ROM and a RAM. The memory MC 12  includes storage areas each having an address in the ROM and the RAM. The processor MC 11  is configured to control the memory MC 12  to store data in the storage areas of the memory MC 12  and reads data from the storage areas of the memory MC 12 . The circuit board MC 13  and the user interface UF 1  are electrically connected to the system bus MC 14 . The circuit board MC 13  and the switch SW 1  are electrically connected to the system bus MC 14 . The use interface is electrically connected to the processor MC 11  and the memory MC 12  with the circuit board MC 13  and the system bus MC 14 . The switch SW 1  is electrically connected to the processor MC 11  and the memory MC 12  with the circuit board MC 13  and the system bus MC 14 . The memory MC 12  (e.g., the ROM) stores a program. The program is read into the processor MC 11 , and thereby the configuration and/or algorithm of the master electric device MD 1  is performed. The master controller MC 1  can also be referred to as a master controller circuit or circuitry MC 1 . 
     The master wireless communicator MW 1  is electrically mounted on the circuit board MC 13 . The master wireless communicator MW 1  is electrically connected to the processor MC 11  and the memory MC 12  with the circuit board MC 13  and the system bus MC 14 . The master wireless communicator MW 1  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the master wireless communicator MW 1  can also be referred to as a master wireless communicator circuit or circuitry MW 1 . 
     The master wireless communicator MW 1  is configured to superimpose digital signals such as the control signal CS 1  on carrier wave using a predetermined wireless communication protocol to wirelessly transmit the control signal CS 1 . In the first embodiment, the master wireless communicator MW 1  is configured to encrypt a control signal CS 1  using a cryptographic key to generate encrypted wireless signals. 
     The master wireless communicator MW 1  is configured to receives a wireless signal via the antenna. In the first embodiment, the master wireless communicator MW 1  is configured to decode the wireless signal to recognize signals and/or information wirelessly transmitted from another wireless communicator. The master wireless communicator MW 1  is configured to decrypt the wireless signal using the cryptographic key. 
     The control system  10  includes an electric power source PS 1 . The electric power source PS 1  is configured to supply electricity to the master electric device MD 1 . The electric power source PS 1  is configured to supply electricity to the master controller MC 1  and the master wireless communicator MW 1 . The master electric device MD 1  is configured to be electrically connected to the electric power source PS 1  configured to be remotely located from the remotely located power source RPS. The master electric device MD 1  includes a power-source holder PH 1  configured to hold the electric power source PS 1 . The power-source holder PH 1  is configured to be detachably and reattachably hold the electric power source PS 1 . The electric power source PS 1  is configured to be detachably and reattachably connected to the power source holder. Examples of the electric power source PS 1  include a battery (e.g., a primary battery or a secondary battery). The electric power source PS 1  can include another component such as a capacitor and an electricity generation element (e.g., a piezoelectric element) instead of or in addition to the battery. 
     The motorized component AS further comprises a connection port CP 1  to which the electric cable EC 1  is configured to be detachably and reattachably connected such that the connection port CP 1  is electrically connected to the at least one of the electric actuator AS 1  and the controller AS 2 . The motorized component AS further comprises the connection port CP 1  to which the electric cable EC 1  is configured to be detachably and reattachably connected such that the connection port CP 1  is electrically connected to the at least one of the electric actuator AS 1 , the wireless communicator WC 1 , and the controller AS 2 . In the first embodiment, the connection port CP 1  is configured to be electrically connected to the electric actuator AS 1 , the wireless communicator WC 1 , and the controller AS 2 . However, the connection port CP 1  can be configured to be electrically connected to only one or two of the electric actuator AS 1 , the wireless communicator WC 1 , and the controller AS 2  if needed and/or desired. 
     As seen in  FIG.  2   , the motorized component AS further comprises a first member AS 3  and a second member AS 4  configured to be movable relative to the first member AS 3 . The motorized component AS further comprises a positioning structure AS 5  configured to adjustably position the first member AS 3  and the second member AS 4  relative to each other. The positioning structure AS 5  is configured to position the first member AS 3  and the second member AS 4  relative to each other in a lock state. The positioning structure AS 5  is configured to allow the first member AS 3  and the second member AS 4  to move relative to each other in an adjustable state. The electric actuator AS 1  is configured to actuate the positioning structure AS 5  to change a state of the positioning structure AS 5  between the lock state and the adjustable state. The controller AS 2  is configured to control the electric actuator AS 1  to actuate the positioning structure AS 5 . 
     The first member AS 3  extends in a longitudinal direction D 1 . The second member AS 4  extends in the longitudinal direction D 1 . The first member AS 3  and the second member AS 4  is configured to be movable relative to each other in the longitudinal direction D 1 . The positioning structure AS 5  is configured to position the first member AS 3  and the second member AS 4  relative to each other in the longitudinal direction D 1  in the lock state and configured to allow the first member AS 3  and the second member AS 4  to move relative to each other in the longitudinal direction D 1  in the adjustable state. 
     In the first embodiment, the positioning structure AS 5  includes a hydraulic valve configured to change the state of the positioning structure AS 5  between the lock state and the adjustable state. The electric actuator AS 1  is configured to move the hydraulic valve between a closed position and an open position. The positioning structure AS 5  is in the lock state in a state where the hydraulic valve is in the closed position. The positioning structure AS 5  is in the adjustable state in a state where the hydraulic valve is in the open position. However, the positioning structure AS 5  can include other structures such as a ball screw. 
     The motorized component AS includes a position sensor AS 6  and a motor driver AS 7 . The electric actuator AS 1  is electrically connected to the position sensor AS 6  and the motor driver AS 7 . The electric actuator AS 1  includes a rotational shaft operatively coupled to the positioning structure AS 5 . The position sensor AS 6  is configured to sense a current position of the hydraulic valve of the positioning structure AS 5 . Examples of the position sensor AS 6  include a potentiometer and a rotary encoder. The position sensor AS 6  is configured to sense an absolute rotational position of an output shaft of the electric actuator AS 1  as the current position of the hydraulic valve of the positioning structure AS 5 . The motor driver AS 7  is configured to control the electric actuator AS 1  based on the current position of the hydraulic valve of the positioning structure AS 5  sensed by the position sensor AS 6 . 
     As seen in  FIG.  2   , the motorized component SS for the human-powered vehicle  2  other than the rear derailleur RD comprises an electric actuator SS 1  and a controller SS 2  configured to control the electric actuator SS 1 . Examples of the electric actuator SS 1  include a motor. 
     At least one of the electric actuator SS 1  and the controller SS 2  is configured to be electrically connected via an electric cable EC 2  to the remotely located power source RPS configured to supply electricity to the assist drive unit DU configured to assist pedaling. In the first embodiment, each of the electric actuator SS 1  and the controller SS 2  is configured to be electrically connected to the remotely located power source RPS via the electric cable EC 2 . However, only one of the electric actuator SS 1  and the controller SS 2  can be configured to be electrically connected via the electric cable EC 2  to the remotely located power source RPS if needed and/or desired. 
     The motorized component SS further comprises a wireless communicator WC 2  electrically connected to the controller SS 2 . The wireless communicator WC 2  is configured to wirelessly communicate with another wireless communicator of another component via a wireless communication channel. The controller SS 2  is configured to receive a control signal from another component via the wireless communicator WC 2 . The controller SS 2  is configured to receive a control signal CS 2  from the master electric device MD 2  via the wireless communicator WC 2 . 
     At least one of the electric actuator SS 1 , the wireless communicator WC 2 , and the controller SS 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 2 . In the first embodiment, each of the electric actuator SS 1 , the wireless communicator WC 2 , and the controller SS 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 2 . However, only one or two of the electric actuator SS 1 , the wireless communicator WC 2 , and the controller SS 2  can be configured to be electrically connected via the electric cable EC 2  to the remotely located power source RPS if needed and/or desired. 
     The controller SS 2  includes a processor SS 21 , a memory SS 22 , a circuit board SS 23 , and a system bus SS 24 . The processor SS 21  and the memory SS 22  are electrically mounted on the circuit board SS 23 . The processor SS 21  includes a CPU and a memory controller. The memory SS 22  is electrically connected to the processor SS 21 . The memory SS 22  includes a ROM and a RAM. The memory SS 22  includes storage areas each having an address in the ROM and the RAM. The processor SS 21  is configured to control the memory SS 22  to store data in the storage areas of the memory SS 22  and reads data from the storage areas of the memory SS 22 . The memory SS 22  (e.g., the ROM) stores a program. The program is read into the processor SS 21 , and thereby the configuration and/or algorithm of the controller SS 2  is performed. The controller SS 2  can also be referred to as a controller circuit or circuitry SS 2 . 
     The wireless communicator WC 2  is electrically mounted on the circuit board SS 23 . The wireless communicator WC 2  is electrically connected to the processor SS 21  and the memory SS 22  with the circuit board SS 23  and the system bus SS 24 . The wireless communicator WC 2  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the wireless communicator WC 2  can also be referred to as a wireless communicator circuit or circuitry WC 2 . 
     The wireless communicator WC 2  is configured to superimpose digital signals on carrier wave using a predetermined wireless communication protocol to wirelessly transmit a control signal. In the first embodiment, the wireless communicator WC 2  is configured to encrypt a control signal using a cryptographic key to generate encrypted wireless signals. 
     The wireless communicator WC 2  is configured to receives a wireless signal via the antenna. In the first embodiment, the wireless communicator WC 2  is configured to decode the wireless signal to recognize the control signal CS 2  wirelessly transmitted from the master electric device MD 2 . The wireless communicator WC 2  is configured to decrypt the control signal CS 2  using the cryptographic key. 
     As seen in  FIG.  2   , the master electric device MD 2  includes a master controller MC 2 . The master electric device MD 2  includes a master wireless communicator MW 2 . The master controller MC 2  is electrically connected to the master wireless communicator MW 2 . The master wireless communicator MW 2  is configured to wirelessly transmit the control signal CS 2  to the wireless communicator WC 2  of the motorized component SS. The controller SS 2  is configured to receive the control signal CS 2  from the master electric device MD 2  via the wireless communicator WC 2 . The controller SS 2  is configured to control the electric actuator SS 1  based on the control signal CS 2  wirelessly transmitted from the master wireless communicator MW 2  of the master electric device MD 2 . 
     The master electric device MD 2  includes a user interface UF 2  configured to receive a user input U 2 . The master wireless communicator MW 2  is configured to wirelessly transmit the control signal CS 2  based on the user input U 2  received by the user interface UF 2 . The user interface UF 2  is electrically connected to the master controller MC 2 . The master controller MC 2  is configured to control the master wireless communicator MW 2  to wirelessly transmit the control signal CS 2  in response to the user input U 2 . In the first embodiment, the user interface UF 2  includes a switch SW 2  configured to be activated in response to the user input U 2 . The switch SW 2  is electrically connected to the master controller MC 2 . However, the user interface UF 2  can include other structures instead of or in addition to the switch SW 2 . 
     The master controller MC 2  includes a processor MC 21 , a memory MC 22 , a circuit board MC 23 , and a system bus MC 24 . The processor MC 21  and the memory MC 22  are electrically mounted on the circuit board MC 23 . The processor MC 21  includes a CPU and a memory controller. The memory MC 22  is electrically connected to the processor MC 21 . The memory MC 22  includes a ROM and a RAM. The memory MC 22  includes storage areas each having an address in the ROM and the RAM. The processor MC 21  is configured to control the memory MC 22  to store data in the storage areas of the memory MC 22  and reads data from the storage areas of the memory MC 22 . The circuit board MC 23  and the user interface UF 2  are electrically connected to the system bus MC 24 . The circuit board MC 23  and the switch SW 2  are electrically connected to the system bus MC 24 . The use interface is electrically connected to the processor MC 21  and the memory MC 22  with the circuit board MC 23  and the system bus MC 24 . The switch SW 2  is electrically connected to the processor MC 21  and the memory MC 22  with the circuit board MC 23  and the system bus MC 24 . The memory MC 22  (e.g., the ROM) stores a program. The program is read into the processor MC 21 , and thereby the configuration and/or algorithm of the master electric device MD 2  is performed. The master controller MC 2  can also be referred to as a master controller circuit or circuitry MC 2 . 
     The master wireless communicator MW 2  is electrically mounted on the circuit board MC 23 . The master wireless communicator MW 2  is electrically connected to the processor MC 21  and the memory MC 22  with the circuit board MC 23  and the system bus MC 24 . The master wireless communicator MW 2  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the master wireless communicator MW 2  can also be referred to as a master wireless communicator circuit or circuitry MW 2 . 
     The master wireless communicator MW 2  is configured to superimpose digital signals such as the control signal CS 2  on carrier wave using a predetermined wireless communication protocol to wirelessly transmit the control signal CS 2 . In the first embodiment, the master wireless communicator MW 2  is configured to encrypt a control signal CS 2  using a cryptographic key to generate encrypted wireless signals. 
     The master wireless communicator MW 2  is configured to receives a wireless signal via the antenna. In the first embodiment, the master wireless communicator MW 2  is configured to decode the wireless signal to recognize signals and/or information wirelessly transmitted from another wireless communicator. The master wireless communicator MW 2  is configured to decrypt the wireless signal using the cryptographic key. 
     The control system  10  includes an electric power source PS 2 . The electric power source PS 2  is configured to supply electricity to the master electric device MD 2 . The electric power source PS 2  is configured to supply electricity to the master controller MC 2  and the master wireless communicator MW 2 . The master electric device MD 2  is configured to be electrically connected to the electric power source PS 2  configured to be remotely located from the remotely located power source RPS. The master electric device MD 2  includes a power-source holder PH 2  configured to hold the electric power source PS 2 . The power-source holder PH 2  is configured to be detachably and reattachably hold the electric power source PS 2 . The electric power source PS 2  is configured to be detachably and reattachably connected to the power source holder. Examples of the electric power source PS 2  include a battery (e.g., a primary battery or a secondary battery). The electric power source PS 2  can include another component such as a capacitor and an electricity generation element (e.g., a piezoelectric element) instead of or in addition to the battery. 
     The motorized component SS further comprises a connection port CP 2  to which the electric cable EC 2  is configured to be detachably and reattachably connected such that the connection port CP 2  is electrically connected to the at least one of the electric actuator SS 1  and the controller SS 2 . The motorized component SS further comprises the connection port CP 2  to which the electric cable EC 2  is configured to be detachably and reattachably connected such that the connection port CP 2  is electrically connected to the at least one of the electric actuator SS 1 , the wireless communicator WC 2 , and the controller SS 2 . In the first embodiment, the connection port CP 2  is configured to be electrically connected to the electric actuator SS 1 , the wireless communicator WC 2 , and the controller SS 2 . However, the connection port CP 2  can be configured to be electrically connected to only one or two of the electric actuator SS 1 , the wireless communicator WC 2 , and the controller SS 2  if needed and/or desired. 
     As seen in  FIG.  2   , the motorized component SS further comprises a first member SS 3  and a second member SS 4  configured to be movable relative to the first member SS 3 . The motorized component SS further comprises a positioning structure SS 5  configured to adjustably position the first member SS 3  and the second member SS 4  relative to each other. The positioning structure SS 5  is configured to position the first member SS 3  and the second member SS 4  relative to each other in a lock state. The positioning structure SS 5  is configured to allow the first member SS 3  and the second member SS 4  to move relative to each other in an adjustable state. The electric actuator SS 1  is configured to actuate the positioning structure SS 5  to change a state of the positioning structure SS 5  between the lock state and the adjustable state. The controller SS 2  is configured to control the electric actuator SS 1  to actuate the positioning structure SS 5 . 
     The first member SS 3  extends in a longitudinal direction D 2 . The second member SS 4  extends in the longitudinal direction D 2 . The first member SS 3  and the second member SS 4  is configured to be movable relative to each other in the longitudinal direction D 2 . The positioning structure SS 5  is configured to position the first member SS 3  and the second member SS 4  relative to each other in the longitudinal direction D 2  in the lock state and configured to allow the first member SS 3  and the second member SS 4  to move relative to each other in the longitudinal direction D 2  in the adjustable state. 
     In the first embodiment, the positioning structure SS 5  includes a hydraulic valve configured to change the state of the positioning structure SS 5  between the lock state and the adjustable state. The electric actuator SS 1  is configured to move the hydraulic valve between a closed position and an open position. The positioning structure SS 5  is in the lock state in a state where the hydraulic valve is in the closed position. The positioning structure SS 5  is in the adjustable state in a state where the hydraulic valve is in the open position. However, the positioning structure SS 5  can include other structures such as a ball screw. 
     The motorized component SS includes a position sensor SS 6  and a motor driver SS 7 . The electric actuator SS 1  is electrically connected to the position sensor SS 6  and the motor driver SS 7 . The electric actuator SS 1  includes a rotational shaft operatively coupled to the positioning structure SS 5 . The position sensor SS 6  is configured to sense a current position of the hydraulic valve of the positioning structure SS 5 . Examples of the position sensor SS 6  include a potentiometer and a rotary encoder. The position sensor SS 6  is configured to sense an absolute rotational position of an output shaft of the electric actuator SS 1  as the current position of the hydraulic valve of the positioning structure SS 5 . The motor driver SS 7  is configured to control the electric actuator SS 1  based on the current position of the hydraulic valve of the positioning structure SS 5  sensed by the position sensor SS 6 . 
     The motorized component SS is configured to absorb and/or damp shock and/or vibration from a road surface in the adjustable state. However, the positioning structure SS 5  can be configured to change an original relative position and/or a stroke between the first member SS 3  and the second member SS 4  in the longitudinal direction D 2 . The positioning structure SS 5  can be configured to change an absorbing and/or damping performance. 
     As seen in  FIG.  2   , the motorized component AB for the human-powered vehicle  2  other than the rear derailleur RD comprises an electric actuator AB 1  and a controller AB 2  configured to control the electric actuator AB 1 . Examples of the electric actuator AB 1  include a motor. 
     At least one of the electric actuator AB 1  and the controller AB 2  is configured to be electrically connected via an electric cable EC 3  to the remotely located power source RPS configured to supply electricity to the assist drive unit DU configured to assist pedaling. In the first embodiment, each of the electric actuator AB 1  and the controller AB 2  is configured to be electrically connected to the remotely located power source RPS via the electric cable EC 3 . However, only one of the electric actuator AB 1  and the controller AB 2  can be configured to be electrically connected via the electric cable EC 3  to the remotely located power source RPS if needed and/or desired. 
     The motorized component AB further comprises a wireless communicator WC 3  electrically connected to the controller AB 2 . The wireless communicator WC 3  is configured to wirelessly communicate with another wireless communicator of another component via a wireless communication channel. The controller AB 2  is configured to receive a control signal from another component via the wireless communicator WC 3 . The controller AB 2  is configured to receive a control signal CS 3  from the master electric device MD 3  via the wireless communicator WC 3 . 
     At least one of the electric actuator AB 1 , the wireless communicator WC 3 , and the controller AB 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 3 . In the first embodiment, each of the electric actuator AB 1 , the wireless communicator WC 3 , and the controller AB 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 3 . However, only one or two of the electric actuator AB 1 , the wireless communicator WC 3 , and the controller AB 2  can be configured to be electrically connected via the electric cable EC 3  to the remotely located power source RPS if needed and/or desired. 
     The controller AB 2  includes a processor AB 21 , a memory AB 22 , a circuit board AB 23 , and a system bus AB 24 . The processor AB 21  and the memory AB 22  are electrically mounted on the circuit board AB 23 . The processor AB 21  includes a CPU and a memory controller. The memory AB 22  is electrically connected to the processor AB 21 . The memory AB 22  includes a ROM and a RAM. The memory AB 22  includes storage areas each having an address in the ROM and the RAM. The processor AB 21  is configured to control the memory AB 22  to store data in the storage areas of the memory AB 22  and reads data from the storage areas of the memory AB 22 . The memory AB 22  (e.g., the ROM) stores a program. The program is read into the processor AB 21 , and thereby the configuration and/or algorithm of the controller AB 2  is performed. The controller AB 2  can also be referred to as a controller circuit or circuitry AB 2 . 
     The wireless communicator WC 3  is electrically mounted on the circuit board AB 23 . The wireless communicator WC 3  is electrically connected to the processor AB 21  and the memory AB 22  with the circuit board AB 23  and the system bus AB 24 . The wireless communicator WC 3  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the wireless communicator WC 3  can also be referred to as a wireless communicator circuit or circuitry WC 3 . 
     The wireless communicator WC 3  is configured to superimpose digital signals on carrier wave using a predetermined wireless communication protocol to wirelessly transmit a control signal. In the first embodiment, the wireless communicator WC 3  is configured to encrypt a control signal using a cryptographic key to generate encrypted wireless signals. 
     The wireless communicator WC 3  is configured to receives a wireless signal via the antenna. In the first embodiment, the wireless communicator WC 3  is configured to decode the wireless signal to recognize the control signal CS 3  wirelessly transmitted from the master electric device MD 3 . The wireless communicator WC 3  is configured to decrypt the control signal CS 3  using the cryptographic key. 
     As seen in  FIG.  2   , the master electric device MD 3  includes a master controller MC 3 . The master electric device MD 3  includes a master wireless communicator MW 3 . The master controller MC 3  is electrically connected to the master wireless communicator MW 3 . The master wireless communicator MW 3  is configured to wirelessly transmit the control signal CS 3  to the wireless communicator WC 3  of the motorized component AB. The controller AB 2  is configured to receive the control signal CS 3  from the master electric device MD 3  via the wireless communicator WC 3 . The controller AB 2  is configured to control the electric actuator AB 1  based on the control signal CS 3  wirelessly transmitted from the master wireless communicator MW 3  of the master electric device MD 3 . 
     The master electric device MD 3  includes a user interface UF 3  configured to receive a user input U 3 . The master wireless communicator MW 3  is configured to wirelessly transmit the control signal CS 3  based on the user input U 3  received by the user interface UF 3 . The user interface UF 3  is electrically connected to the master controller MC 3 . The master controller MC 3  is configured to control the master wireless communicator MW 3  to wirelessly transmit the control signal CS 3  in response to the user input U 3 . In the first embodiment, the user interface UF 3  includes a switch SW 3  configured to be activated in response to the user input U 3 . The switch SW 3  is electrically connected to the master controller MC 3 . However, the user interface UF 3  can include other structures instead of or in addition to the switch SW 3 . 
     The master controller MC 3  includes a processor MC 31 , a memory MC 32 , a circuit board MC 33 , and a system bus MC 34 . The processor MC 31  and the memory MC 32  are electrically mounted on the circuit board MC 33 . The processor MC 31  includes a CPU and a memory controller. The memory MC 32  is electrically connected to the processor MC 31 . The memory MC 32  includes a ROM and a RAM. The memory MC 32  includes storage areas each having an address in the ROM and the RAM. The processor MC 31  is configured to control the memory MC 32  to store data in the storage areas of the memory MC 32  and reads data from the storage areas of the memory MC 32 . The circuit board MC 33  and the user interface UF 3  are electrically connected to the system bus MC 34 . The circuit board MC 33  and the switch SW 3  are electrically connected to the system bus MC 34 . The use interface is electrically connected to the processor MC 31  and the memory MC 32  with the circuit board MC 33  and the system bus MC 34 . The switch SW 3  is electrically connected to the processor MC 31  and the memory MC 32  with the circuit board MC 33  and the system bus MC 34 . The memory MC 32  (e.g., the ROM) stores a program. The program is read into the processor MC 31 , and thereby the configuration and/or algorithm of the master electric device MD 3  is performed. The master controller MC 3  can also be referred to as a master controller circuit or circuitry MC 3 . 
     The master wireless communicator MW 3  is electrically mounted on the circuit board MC 33 . The master wireless communicator MW 3  is electrically connected to the processor MC 31  and the memory MC 32  with the circuit board MC 33  and the system bus MC 34 . The master wireless communicator MW 3  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the master wireless communicator MW 3  can also be referred to as a master wireless communicator circuit or circuitry MW 3 . 
     The master wireless communicator MW 3  is configured to superimpose digital signals such as the control signal CS 3  on carrier wave using a predetermined wireless communication protocol to wirelessly transmit the control signal CS 3 . In the first embodiment, the master wireless communicator MW 3  is configured to encrypt a control signal CS 3  using a cryptographic key to generate encrypted wireless signals. 
     The master wireless communicator MW 3  is configured to receives a wireless signal via the antenna. In the first embodiment, the master wireless communicator MW 3  is configured to decode the wireless signal to recognize signals and/or information wirelessly transmitted from another wireless communicator. The master wireless communicator MW 3  is configured to decrypt the wireless signal using the cryptographic key. 
     The control system  10  includes an electric power source PS 3 . The electric power source PS 3  is configured to supply electricity to the master electric device MD 1  The electric power source PS 3  is configured to supply electricity to the master controller MC 3  and the master wireless communicator MW 3 . The master electric device MD 3  is configured to be electrically connected to the electric power source PS 3  configured to be remotely located from the remotely located power source RPS. The master electric device MD 3  includes a power-source holder PH 3  configured to hold the electric power source PS 3 . The power-source holder PH 3  is configured to be detachably and reattachably hold the electric power source PS 3 . The electric power source PS 3  is configured to be detachably and reattachably connected to the power source holder. Examples of the electric power source PS 3  include a battery (e.g., a primary battery or a secondary battery). The electric power source PS 3  can include another component such as a capacitor and an electricity generation element (e.g., a piezoelectric element) instead of or in addition to the battery. 
     The motorized component AB further comprises a connection port CP 3  to which the electric cable EC 3  is configured to be detachably and reattachably connected such that the connection port CP 3  is electrically connected to the at least one of the electric actuator AB 1  and the controller AB 2 . The motorized component AB further comprises the connection port CP 3  to which the electric cable EC 3  is configured to be detachably and reattachably connected such that the connection port CP 3  is electrically connected to the at least one of the electric actuator AB 1 , the wireless communicator WC 3 , and the controller AB 2 . In the first embodiment, the connection port CP 3  is configured to be electrically connected to the electric actuator AB 1 , the wireless communicator WC 3 , and the controller AB 2 . However, the connection port CP 3  can be configured to be electrically connected to only one or two of the electric actuator AB 1 , the wireless communicator WC 3 , and the controller AB 2  if needed and/or desired. 
     As seen in  FIG.  2   , the electric actuator AB 1  is configured to control a restriction state of the restriction structure BD 1  configured to restrict a travel of the human-powered vehicle  2 . The motorized component AB includes a hydraulic device AB 3 , a rotation sensor AB 4 , and a rotation sensor AB 5 . The hydraulic device AB 3  is configured to control a hydraulic pressure supplied from the restriction operating device BD 2  to the restriction structure BD 1 . The hydraulic device AB 3  is configured to control a hydraulic pressure supplied from the brake operating device BD 21  to the brake unit BD 11  (see e.g.,  FIG.  1   ). The hydraulic device AB 3  is configured to control a hydraulic pressure supplied from the brake operating device BD 22  to the brake unit BD 12  (see e.g.,  FIG.  1   ). For example, the controller AB 2  is configured to control the electric actuator AB 1  to change the restriction state of the restriction structure BD 1  via the hydraulic device AB 3  if the rotational speed of the front wheel W 1  is lower than the rotational speed of the rear wheel W 2 . 
     As seen in  FIG.  3   , the motorized component FD for the human-powered vehicle  2  other than the rear derailleur RD comprises an electric actuator FD 1  and a controller FD 2  configured to control the electric actuator FD 1 . Examples of the electric actuator FD 1  include a motor. 
     At least one of the electric actuator FD 1  and the controller FD 2  is configured to be electrically connected via an electric cable EC 4  to the remotely located power source RPS configured to supply electricity to the assist drive unit DU configured to assist pedaling. In the first embodiment, each of the electric actuator FD 1  and the controller FD 2  is configured to be electrically connected to the remotely located power source RPS via the electric cable EC 4 . However, only one of the electric actuator FD 1  and the controller FD 2  can be configured to be electrically connected via the electric cable EC 4  to the remotely located power source RPS if needed and/or desired. 
     The motorized component FD further comprises a wireless communicator WC 4  electrically connected to the controller FD 2 . The wireless communicator WC 4  is configured to wirelessly communicate with another wireless communicator of another component via a wireless communication channel. The controller FD 2  is configured to receive a control signal from another component via the wireless communicator WC 4 . The controller FD 2  is configured to receive a control signal CS 4  from the master electric device MD 4  via the wireless communicator WC 4 . 
     At least one of the electric actuator FD 1 , the wireless communicator WC 4 , and the controller FD 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 4 . In the first embodiment, each of the electric actuator FD 1 , the wireless communicator WC 4 , and the controller FD 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 4 . However, only one or two of the electric actuator FD 1 , the wireless communicator WC 4 , and the controller FD 2  can be configured to be electrically connected via the electric cable EC 4  to the remotely located power source RPS if needed and/or desired. 
     The controller FD 2  includes a processor FD 21 , a memory FD 22 , a circuit board FD 23 , and a system bus FD 24 . The processor FD 21  and the memory FD 22  are electrically mounted on the circuit board FD 23 . The processor FD 21  includes a CPU and a memory controller. The memory FD 22  is electrically connected to the processor FD 21 . The memory FD 22  includes a ROM and a RAM. The memory FD 22  includes storage areas each having an address in the ROM and the RAM. The processor FD 21  is configured to control the memory FD 22  to store data in the storage areas of the memory FD 22  and reads data from the storage areas of the memory FD 22 . The memory FD 22  (e.g., the ROM) stores a program. The program is read into the processor FD 21 , and thereby the configuration and/or algorithm of the controller FD 2  is performed. The controller FD 2  can also be referred to as a controller circuit or circuitry FD 2 . 
     The wireless communicator WC 4  is electrically mounted on the circuit board FD 23 . The wireless communicator WC 4  is electrically connected to the processor FD 21  and the memory FD 22  with the circuit board FD 23  and the system bus FD 24 . The wireless communicator WC 4  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the wireless communicator WC 4  can also be referred to as a wireless communicator circuit or circuitry WC 4 . 
     The wireless communicator WC 4  is configured to superimpose digital signals on carrier wave using a predetermined wireless communication protocol to wirelessly transmit a control signal. In the first embodiment, the wireless communicator WC 4  is configured to encrypt a control signal using a cryptographic key to generate encrypted wireless signals. 
     The wireless communicator WC 4  is configured to receives a wireless signal via the antenna. In the first embodiment, the wireless communicator WC 4  is configured to decode the wireless signal to recognize the control signal CS 4  wirelessly transmitted from the master electric device MD 4 . The wireless communicator WC 4  is configured to decrypt the control signal CS 4  using the cryptographic key. 
     As seen in  FIG.  3   , the master electric device MD 4  includes a master controller MC 4 . The master electric device MD 4  includes a master wireless communicator MW 4 . The master controller MC 4  is electrically connected to the master wireless communicator MW 4 . The master wireless communicator MW 4  is configured to wirelessly transmit the control signal CS 4  to the wireless communicator WC 4  of the motorized component FD. The controller FD 2  is configured to receive the control signal CS 4  from the master electric device MD 4  via the wireless communicator WC 4 . The controller FD 2  is configured to control the electric actuator FD 1  based on the control signal CS 4  wirelessly transmitted from the master wireless communicator MW 4  of the master electric device MD 4 . 
     The master electric device MD 4  includes a user interface UF 4  configured to receive a user input U 4 . The master wireless communicator MW 4  is configured to wirelessly transmit the control signal CS 4  based on the user input U 4  received by the user interface UF 4 . The user interface UF 4  is electrically connected to the master controller MC 4 . The master controller MC 4  is configured to control the master wireless communicator MW 4  to wirelessly transmit the control signal CS 4  in response to the user input U 4 . In the first embodiment, the user interface UF 4  includes a switch SW 4  configured to be activated in response to the user input U 4 . The switch SW 4  is electrically connected to the master controller MC 4 . However, the user interface UF 4  can include other structures instead of or in addition to the switch SW 4 . 
     The master controller MC 4  includes a processor MC 41 , a memory MC 42 , a circuit board MC 43 , and a system bus MC 44 . The processor MC 41  and the memory MC 42  are electrically mounted on the circuit board MC 43 . The processor MC 41  includes a CPU and a memory controller. The memory MC 42  is electrically connected to the processor MC 41 . The memory MC 42  includes a ROM and a RAM. The memory MC 42  includes storage areas each having an address in the ROM and the RAM. The processor MC 41  is configured to control the memory MC 42  to store data in the storage areas of the memory MC 42  and reads data from the storage areas of the memory MC 42 . The circuit board MC 43  and the user interface UF 4  are electrically connected to the system bus MC 44 . The circuit board MC 43  and the switch SW 4  are electrically connected to the system bus MC 44 . The use interface is electrically connected to the processor MC 41  and the memory MC 42  with the circuit board MC 43  and the system bus MC 44 . The switch SW 4  is electrically connected to the processor MC 41  and the memory MC 42  with the circuit board MC 43  and the system bus MC 44 . The memory MC 42  (e.g., the ROM) stores a program. The program is read into the processor MC 41 , and thereby the configuration and/or algorithm of the master electric device MD 4  is performed. The master controller MC 4  can also be referred to as a master controller circuit or circuitry MC 4 . 
     The master wireless communicator MW 4  is electrically mounted on the circuit board MC 43 . The master wireless communicator MW 4  is electrically connected to the processor MC 41  and the memory MC 42  with the circuit board MC 43  and the system bus MC 44 . The master wireless communicator MW 4  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the master wireless communicator MW 4  can also be referred to as a master wireless communicator circuit or circuitry MW 4 . 
     The master wireless communicator MW 4  is configured to superimpose digital signals such as the control signal CS 4  on carrier wave using a predetermined wireless communication protocol to wirelessly transmit the control signal CS 4 . In the first embodiment, the master wireless communicator MW 4  is configured to encrypt a control signal CS 4  using a cryptographic key to generate encrypted wireless signals. 
     The master wireless communicator MW 4  is configured to receives a wireless signal via the antenna. In the first embodiment, the master wireless communicator MW 4  is configured to decode the wireless signal to recognize signals and/or information wirelessly transmitted from another wireless communicator. The master wireless communicator MW 4  is configured to decrypt the wireless signal using the cryptographic key. 
     The control system  10  includes an electric power source PS 4 . The electric power source PS 4  is configured to supply electricity to the master electric device MD 4 . The electric power source PS 4  is configured to supply electricity to the master controller MC 4  and the master wireless communicator MW 4 . The master electric device MD 4  is configured to be electrically connected to the electric power source PS 4  configured to be remotely located from the remotely located power source RPS. The master electric device MD 4  includes a power-source holder PH 4  configured to hold the electric power source PS 4 . The power-source holder PH 4  is configured to be detachably and reattachably hold the electric power source PS 4 . The electric power source PS 4  is configured to be detachably and reattachably connected to the power source holder. Examples of the electric power source PS 4  include a battery (e.g., a primary battery or a secondary battery). The electric power source PS 4  can include another component such as a capacitor and an electricity generation element (e.g., a piezoelectric element) instead of or in addition to the battery. 
     The motorized component FD further comprises a connection port CP 4  to which the electric cable EC 4  is configured to be detachably and reattachably connected such that the connection port CP 4  is electrically connected to the at least one of the electric actuator FD 1  and the controller FD 2 . The motorized component FD further comprises the connection port CP 4  to which the electric cable EC 4  is configured to be detachably and reattachably connected such that the connection port CP 4  is electrically connected to the at least one of the electric actuator FD 1 , the wireless communicator WC 4 , and the controller FD 2 . In the first embodiment, the connection port CP 4  is configured to be electrically connected to the electric actuator FD 1 , the wireless communicator WC 4 , and the controller FD 2 . However, the connection port CP 4  can be configured to be electrically connected to only one or two of the electric actuator FD 1 , the wireless communicator WC 4 , and the controller FD 2  if needed and/or desired. 
     The motorized component FD further comprises a first member FD 3  and a second member FD 4  configured to be movable relative to the first member FD 3 . The motorized component FD further comprises a positioning structure FD 5  configured to adjustably position the first member FD 3  and the second member FD 4  relative to each other. The first member FD 3  is configured to secured to the frame  2 A (see e.g.,  FIG.  1   ). The second member FD 4  includes a chain guide contactable with the chain C (see e.g.,  FIG.  1   ). The electric actuator FD 1  is configured to move the second member FD 4  relative to the first member FD 3  to shift the chain C relative to the front sprocket assembly FS. 
     The motorized component FD includes a position sensor FD 6  and a motor driver FD 7 . The electric actuator FD 1  is electrically connected to the position sensor FD 6  and the motor driver FD 7 . The electric actuator FD 1  includes a rotational shaft operatively coupled to the second member FD 4 . The position sensor FD 6  is configured to sense a current position of the second member FD 4  relative to the first member FD 3 . Examples of the position sensor FD 6  include a potentiometer and a rotary encoder. The position sensor FD 6  is configured to sense an absolute rotational position of an output shaft of the electric actuator FD 1  as the current position of the second member FD 4  relative to the first member FD 3 . The motor driver FD 7  is configured to control the electric actuator FD 1  based on the current position of the second member FD 4  relative to the first member FD 3  sensed by the position sensor FD 6 . 
     As seen in  FIG.  2   , the motorized component LE for the human-powered vehicle  2  other than the rear derailleur RD comprises an electric actuator LE 1  and a controller LE 2  configured to control the electric actuator LE 1 . Examples of the electric actuator LE 1  include a motor. 
     At least one of the electric actuator LE 1  and the controller LE 2  is configured to be electrically connected via an electric cable EC 5  to the remotely located power source RPS configured to supply electricity to the assist drive unit DU configured to assist pedaling. In the first embodiment, each of the electric actuator LE 1  and the controller LE 2  is configured to be electrically connected to the remotely located power source RPS via the electric cable EC 5 . However, only one of the electric actuator LE 1  and the controller LE 2  can be configured to be electrically connected via the electric cable EC 5  to the remotely located power source RPS if needed and/or desired. 
     The motorized component LE further comprises a wireless communicator WC 5  electrically connected to the controller LE 2 . The wireless communicator WC 5  is configured to wirelessly communicate with another wireless communicator of another component via a wireless communication channel. The controller LE 2  is configured to receive a control signal from another component via the wireless communicator WC 5 . The controller LE 2  is configured to receive a control signal CS 5  from the master electric device MD 5  via the wireless communicator WC 5 . 
     At least one of the electric actuator LE 1 , the wireless communicator WC 5 , and the controller LE 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 5 . In the first embodiment, each of the electric actuator LE 1 , the wireless communicator WC 5 , and the controller LE 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 5 . However, only one or two of the electric actuator LE 1 , the wireless communicator WC 5 , and the controller LE 2  can be configured to be electrically connected via the electric cable EC 5  to the remotely located power source RPS if needed and/or desired. 
     The controller LE 2  includes a processor LE 21 , a memory LE 22 , a circuit board LE 23 , and a system bus LE 24 . The processor LE 21  and the memory LE 22  are electrically mounted on the circuit board LE 23 . The processor LE 21  includes a CPU and a memory controller. The memory LE 22  is electrically connected to the processor LE 21 . The memory LE 22  includes a ROM and a RAM. The memory LE 22  includes storage areas each having an address in the ROM and the RAM. The processor LE 21  is configured to control the memory LE 22  to store data in the storage areas of the memory LE 22  and reads data from the storage areas of the memory LE 22 . The memory LE 22  (e.g., the ROM) stores a program. The program is read into the processor LE 21 , and thereby the configuration and/or algorithm of the controller LE 2  is performed. The controller LE 2  can also be referred to as a controller circuit or circuitry LE 2 . 
     The wireless communicator WC 5  is electrically mounted on the circuit board LE 23 . The wireless communicator WC 5  is electrically connected to the processor LE 21  and the memory LE 22  with the circuit board LE 23  and the system bus LE 24 . The wireless communicator WC 5  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the wireless communicator WC 5  can also be referred to as a wireless communicator circuit or circuitry WC 5 . 
     The wireless communicator WC 5  is configured to superimpose digital signals on carrier wave using a predetermined wireless communication protocol to wirelessly transmit a control signal. In the first embodiment, the wireless communicator WC 5  is configured to encrypt a control signal using a cryptographic key to generate encrypted wireless signals. 
     The wireless communicator WC 5  is configured to receives a wireless signal via the antenna. In the first embodiment, the wireless communicator WC 5  is configured to decode the wireless signal to recognize the control signal CS 5  wirelessly transmitted from the master electric device MD 5 . The wireless communicator WC 5  is configured to decrypt the control signal CS 5  using the cryptographic key. 
     As seen in  FIG.  2   , the master electric device MD 5  includes a master controller MC 5 . The master electric device MD 5  includes a master wireless communicator MW 5 . The master controller MC 5  is electrically connected to the master wireless communicator MW 5 . The master wireless communicator MW 5  is configured to wirelessly transmit the control signal CS 5  to the wireless communicator WC 5  of the motorized component LE. The controller LE 2  is configured to receive the control signal CS 5  from the master electric device MD 5  via the wireless communicator WC 5 . The controller LE 2  is configured to control the electric actuator LE 1  based on the control signal CS 5  wirelessly transmitted from the master wireless communicator MW 5  of the master electric device MD 5 . 
     The master electric device MD 5  includes a user interface UF 5  configured to receive a user input U 5 . The master wireless communicator MW 5  is configured to wirelessly transmit the control signal CS 5  based on the user input U 5  received by the user interface UF 5 . The user interface UF 5  is electrically connected to the master controller MC 5 . The master controller MC 5  is configured to control the master wireless communicator MW 5  to wirelessly transmit the control signal CS 5  in response to the user input U 5 . In the first embodiment, the user interface UF 5  includes a switch SW 5  configured to be activated in response to the user input U 5 . The switch SW 5  is electrically connected to the master controller MC 5 . However, the user interface UF 5  can include other structures instead of or in addition to the switch SW 5 . 
     The master controller MC 5  includes a processor MC 51 , a memory MC 52 , a circuit board MC 53 , and a system bus MC 54 . The processor MC 51  and the memory MC 52  are electrically mounted on the circuit board MC 53 . The processor MC 51  includes a CPU and a memory controller. The memory MC 52  is electrically connected to the processor MC 51 . The memory MC 52  includes a ROM and a RAM. The memory MC 52  includes storage areas each having an address in the ROM and the RAM. The processor MC 51  is configured to control the memory MC 52  to store data in the storage areas of the memory MC 52  and reads data from the storage areas of the memory MC 52 . The circuit board MC 53  and the user interface UF 5  are electrically connected to the system bus MC 54 . The circuit board MC 53  and the switch SW 5  are electrically connected to the system bus MC 54 . The use interface is electrically connected to the processor MC 51  and the memory MC 52  with the circuit board MC 53  and the system bus MC 54 . The switch SW 5  is electrically connected to the processor MC 51  and the memory MC 52  with the circuit board MC 53  and the system bus MC 54 . The memory MC 52  (e.g., the ROM) stores a program. The program is read into the processor MC 51 , and thereby the configuration and/or algorithm of the master electric device MD 5  is performed. The master controller MC 5  can also be referred to as a master controller circuit or circuitry MC 5 . 
     The master wireless communicator MW 5  is electrically mounted on the circuit board MC 53 . The master wireless communicator MW 5  is electrically connected to the processor MC 51  and the memory MC 52  with the circuit board MC 53  and the system bus MC 54 . The master wireless communicator MW 5  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the master wireless communicator MW 5  can also be referred to as a master wireless communicator circuit or circuitry MW 5 . 
     The master wireless communicator MW 5  is configured to superimpose digital signals such as the control signal CS 5  on carrier wave using a predetermined wireless communication protocol to wirelessly transmit the control signal CS 5 . In the first embodiment, the master wireless communicator MW 5  is configured to encrypt a control signal CS 5  using a cryptographic key to generate encrypted wireless signals. 
     The master wireless communicator MW 5  is configured to receives a wireless signal via the antenna. In the first embodiment, the master wireless communicator MW 5  is configured to decode the wireless signal to recognize signals and/or information wirelessly transmitted from another wireless communicator. The master wireless communicator MW 5  is configured to decrypt the wireless signal using the cryptographic key. 
     The control system  10  includes an electric power source PS 5 . The electric power source PS 5  is configured to supply electricity to the master electric device MD 5 . The electric power source PS 5  is configured to supply electricity to the master controller MC 5  and the master wireless communicator MW 5 . The master electric device MD 5  is configured to be electrically connected to the electric power source PS 5  configured to be remotely located from the remotely located power source RPS. The master electric device MD 5  includes a power-source holder PH 5  configured to hold the electric power source PS 5 . The power-source holder PH 5  is configured to be detachably and reattachably hold the electric power source PS 5 . The electric power source PS 5  is configured to be detachably and reattachably connected to the power source holder. Examples of the electric power source PS 5  include a battery (e.g., a primary battery or a secondary battery). The electric power source PS 5  can include another component such as a capacitor and an electricity generation element (e.g., a piezoelectric element) instead of or in addition to the battery. 
     The motorized component LE further comprises a connection port CP 5  to which the electric cable EC 5  is configured to be detachably and reattachably connected such that the connection port CP 5  is electrically connected to the at least one of the electric actuator LE 1  and the controller LE 2 . The motorized component LE further comprises the connection port CP 5  to which the electric cable EC 5  is configured to be detachably and reattachably connected such that the connection port CP 5  is electrically connected to the at least one of the electric actuator LE 1 , the wireless communicator WC 5 , and the controller LE 2 . In the first embodiment, the connection port CP 5  is configured to be electrically connected to the electric actuator LE 1 , the wireless communicator WC 5 , and the controller LE 2 . However, the connection port CP 5  can be configured to be electrically connected to only one or two of the electric actuator LE 1 , the wireless communicator WC 5 , and the controller LE 2  if needed and/or desired. 
     The motorized component LE further comprises a first member LE 3  and a second member LE 4  configured to be movable relative to the first member LE 3 . The motorized component LE further comprises a positioning structure LE 5  configured to adjustably position the first member LE 3  and the second member LE 4  relative to each other. The first member LE 3  is configured to secured to the frame  2 A (see e.g.,  FIG.  1   ). The second member LE 4  includes a light emitting unit configured to emit light. The light emitting unit includes a light emitting diode (LED). The controller LE 2  is electrically connected to the light emitting unit of the second member LE 4  to supply electricity supplied from the remotely located power source RPS. Thus, the light emitting unit of the second member LE 4  is configured to be electrically connected to the remotely located power source RPS via the controller LE 2  and the wired communication structure WS. The controller LE 2  is configured to control a lighting state of the light emitting unit of the second member LE 4  in response to the control signal CS 5 . 
     The electric actuator LE 1  is configured to move the second member LE 4  to change a direction in which the light emitting unit of the second member LE 4  faces. The controller LE 2  is configured to control the electric actuator LE 1  to change the direction of the light emitting unit of the second member LE 4  in response to the control signal CS 5 . In the first embodiment, the motorized component LE serves as a head lamp. However, the motorized component LE can serve as another lamp such as a tail lamp. 
     As seen in  FIG.  3   , the rear derailleur RD includes a derailleur actuator RD 1  and a derailleur controller RD 2  configured to control the derailleur actuator RD 1 . Examples of the derailleur actuator RD 1  include a motor. 
     At least one of the derailleur actuator RD 1  and the derailleur controller RD 2  is configured to be electrically connected via an electric cable EC 6  to the remotely located power source RPS. In the first embodiment, each of the derailleur actuator RD 1  and the derailleur controller RD 2  is configured to be electrically connected to the remotely located power source RPS via the electric cable EC 6 . However, only one of the derailleur actuator RD 1  and the derailleur controller RD 2  can be configured to be electrically connected via the electric cable EC 6  to the remotely located power source RPS if needed and/or desired. 
     The rear derailleur RD further comprises a derailleur wireless communicator WC 6  electrically connected to the derailleur controller RD 2 . The derailleur wireless communicator WC 6  is configured to wirelessly communicate with another wireless communicator of another component via a wireless communication channel. The derailleur controller RD 2  is configured to receive a control signal from another component via the derailleur wireless communicator WC 6 . The derailleur controller RD 2  is configured to receive a shift control signal CS 6  from the shift operating device MD 6  via the derailleur wireless communicator WC 6 . 
     At least one of the derailleur actuator RD 1 , the derailleur wireless communicator WC 6 , and the derailleur controller RD 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 6 . In the first embodiment, each of the derailleur actuator RD 1 , the derailleur wireless communicator WC 6 , and the derailleur controller RD 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 6 . However, only one or two of the derailleur actuator RD 1 , the derailleur wireless communicator WC 6 , and the derailleur controller RD 2  can be configured to be electrically connected via the electric cable EC 6  to the remotely located power source RPS if needed and/or desired. 
     The derailleur controller RD 2  includes a processor RD 21 , a memory RD 22 , a circuit board RD 23 , and a system bus RD 24 . The derailleur processor RD 21  and the memory RD 22  are electrically mounted on the circuit board RD 23 . The derailleur processor RD 21  includes a CPU and a memory controller. The memory RD 22  is electrically connected to the derailleur processor RD 21 . The memory RD 22  includes a ROM and a RAM. The memory RD 22  includes storage areas each having an address in the ROM and the RAM. The derailleur processor RD 21  is configured to control the memory RD 22  to store data in the storage areas of the memory RD 22  and reads data from the storage areas of the memory RD 22 . The memory RD 22  (e.g., the ROM) stores a program. The program is read into the derailleur processor RD 21 , and thereby the configuration and/or algorithm of the derailleur controller RD 2  is performed. The derailleur controller RD 2  can also be referred to as a derailleur controller circuit or circuitry RD 2 . 
     The derailleur wireless communicator WC 6  is electrically mounted on the circuit board RD 23 . The derailleur wireless communicator WC 6  is electrically connected to the derailleur processor RD 21  and the memory RD 22  with the circuit board RD 23  and the system bus RD 24 . The derailleur wireless communicator WC 6  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the derailleur wireless communicator WC 6  can also be referred to as a wireless communicator circuit or circuitry WC 6 . 
     The derailleur wireless communicator WC 6  is configured to superimpose digital signals on carrier wave using a predetermined wireless communication protocol to wirelessly transmit a control signal. In the first embodiment, the derailleur wireless communicator WC 6  is configured to encrypt a control signal using a cryptographic key to generate encrypted wireless signals. 
     The derailleur wireless communicator WC 6  is configured to receives a wireless signal via the antenna. In the first embodiment, the derailleur wireless communicator WC 6  is configured to decode the wireless signal to recognize the shift control signal CS 6  wirelessly transmitted from the shift operating device MD 6 . The derailleur wireless communicator WC 6  is configured to decrypt the shift control signal CS 6  using the cryptographic key. 
     As seen in  FIG.  3   , the shift operating device MD 6  includes a shift operating controller MC 6 . The shift operating device MD 6  includes a shift wireless communicator MW 6 . The shift operating controller MC 6  is electrically connected to the shift wireless communicator MW 6 . The shift wireless communicator MW 6  is configured to wirelessly transmit the shift control signal CS 6  to the derailleur wireless communicator WC 6  of the rear derailleur RD. The derailleur controller RD 2  is configured to receive the shift control signal CS 6  from the shift operating device MD 6  via the derailleur wireless communicator WC 6 . The derailleur controller RD 2  is configured to control the derailleur actuator RD 1  based on the shift control signal CS 6  wirelessly transmitted from the shift wireless communicator MW 6  of the shift operating device MD 6 . 
     The shift operating device MD 6  includes a user interface UF 6  configured to receive a user input U 6 . The shift wireless communicator MW 6  is configured to wirelessly transmit the shift control signal CS 6  based on the user input U 6  received by the user interface UF 6 . The user interface UF 6  is electrically connected to the shift operating controller MC 6 . The shift operating controller MC 6  is configured to control the shift wireless communicator MW 6  to wirelessly transmit the shift control signal CS 6  in response to the user input U 6 . In the first embodiment, the user interface UF 6  includes a switch SW 6  configured to be activated in response to the user input U 6 . The switch SW 6  is electrically connected to the shift operating controller MC 6 . However, the user interface UF 6  can include other structures instead of or in addition to the switch SW 6 . 
     The shift operating controller MC 6  includes a processor MC 61 , a memory MC 62 , a circuit board MC 63 , and a system bus MC 64 . The processor MC 61  and the memory MC 62  are electrically mounted on the circuit board MC 63 . The processor MC 61  includes a CPU and a memory controller. The memory MC 62  is electrically connected to the processor MC 61 . The memory MC 62  includes a ROM and a RAM. The memory MC 62  includes storage areas each having an address in the ROM and the RAM. The processor MC 61  is configured to control the memory MC 62  to store data in the storage areas of the memory MC 62  and reads data from the storage areas of the memory MC 62 . The circuit board MC 63  and the user interface UF 6  are electrically connected to the system bus MC 64 . The circuit board MC 63  and the switch SW 6  are electrically connected to the system bus MC 64 . The use interface is electrically connected to the processor MC 61  and the memory MC 62  with the circuit board MC 63  and the system bus MC 64 . The switch SW 6  is electrically connected to the processor MC 61  and the memory MC 62  with the circuit board MC 63  and the system bus MC 64 . The memory MC 62  (e.g., the ROM) stores a program. The program is read into the processor MC 61 , and thereby the configuration and/or algorithm of the shift operating device MD 6  is performed. The shift operating controller MC 6  can also be referred to as a shift operating controller circuit or circuitry MC 6 . 
     The shift wireless communicator MW 6  is electrically mounted on the circuit board MC 63 . The shift wireless communicator MW 6  is electrically connected to the processor MC 61  and the memory MC 62  with the circuit board MC 63  and the system bus MC 64 . The shift wireless communicator MW 6  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the shift wireless communicator MW 6  can also be referred to as a wireless communicator circuit or circuitry MW 6 . 
     The shift wireless communicator MW 6  is configured to superimpose digital signals such as the shift control signal CS 6  on carrier wave using a predetermined wireless communication protocol to wirelessly transmit the shift control signal CS 6 . In the first embodiment, the shift wireless communicator MW 6  is configured to encrypt a shift control signal CS 6  using a cryptographic key to generate encrypted wireless signals. 
     The shift wireless communicator MW 6  is configured to receives a wireless signal via the antenna. In the first embodiment, the shift wireless communicator MW 6  is configured to decode the wireless signal to recognize signals and/or information wirelessly transmitted from another wireless communicator. The shift wireless communicator MW 6  is configured to decrypt the wireless signal using the cryptographic key. 
     The control system  10  includes an electric power source PS 6 . The electric power source PS 6  is configured to supply electricity to the shift operating device MD 6 . The electric power source PS 6  is configured to supply electricity to the shift operating controller MC 6  and the shift wireless communicator MW 6 . The shift operating device MD 6  is configured to be electrically connected to the electric power source PS 6  configured to be remotely located from the remotely located power source RPS. The shift operating device MD 6  includes a power-source holder PH 6  configured to hold the electric power source PS 6 . The power-source holder PH 6  is configured to be detachably and reattachably hold the electric power source PS 6 . The electric power source PS 6  is configured to be detachably and reattachably connected to the power source holder. Examples of the electric power source PS 6  include a battery (e.g., a primary battery or a secondary battery). The electric power source PS 6  can include another component such as a capacitor and an electricity generation element (e.g., a piezoelectric element) instead of or in addition to the battery. 
     The rear derailleur RD further comprises a connection port CP 6  to which the electric cable EC 6  is configured to be detachably and reattachably connected such that the connection port CP 6  is electrically connected to the at least one of the derailleur actuator RD 1  and the derailleur controller RD 2 . The rear derailleur RD further comprises the connection port CP 6  to which the electric cable EC 6  is configured to be detachably and reattachably connected such that the connection port CP 6  is electrically connected to the at least one of the derailleur actuator RD 1 , the derailleur wireless communicator WC 6 , and the derailleur controller RD 2 . In the first embodiment, the connection port CP 6  is configured to be electrically connected to the derailleur actuator RD 1 , the derailleur wireless communicator WC 6 , and the derailleur controller RD 2 . However, the connection port CP 6  can be configured to be electrically connected to only one or two of the derailleur actuator RD 1 , the derailleur wireless communicator WC 6 , and the derailleur controller RD 2  if needed and/or desired. 
     The rear derailleur RD includes a base member RD 3  and a movable member RD 4 . The movable member RD 4  is movably coupled to the base member RD 3 . The movable member RD 4  is configured to guide the chain C. The derailleur actuator RD 1  is configured to move the movable member RD 4  relative to the base member RD 3  to shift the chain C relative to the front sprocket assembly FS. 
     The rear derailleur RD includes a position sensor RD 6  and a motor driver RD 7 . The derailleur actuator RD 1  is electrically connected to the position sensor RD 6  and the motor driver RD 7 . The derailleur actuator RD 1  includes a rotational shaft operatively coupled to the movable member RD 4 . The position sensor RD 6  is configured to sense a current position of the movable member RD 4  relative to the base member RD 3 . Examples of the position sensor RD 6  include a potentiometer and a rotary encoder. The position sensor RD 6  is configured to sense an absolute rotational position of an output shaft of the derailleur actuator RD 1  as the current position of the movable member RD 4  relative to the base member RD 3 . The motor driver RD 7  is configured to control the derailleur actuator RD 1  based on the current position of the movable member RD 4  relative to the base member RD 3  sensed by the position sensor RD 6 . 
     As seen in  FIG.  4   , the assist drive unit DU includes an assist controller DU 2  configured to control the assist motor DU 1 . At least one of the assist motor DU 1  and the assist controller DU 2  is configured to be electrically connected via an electric cable EC 7  to the remotely located power source RPS configured to supply electricity to the assist drive unit DU configured to assist pedaling. In the first embodiment, each of the assist motor DU 1  and the assist controller DU 2  is configured to be electrically connected to the remotely located power source RPS via the electric cable EC 7 . However, only one of the assist motor DU 1  and the assist controller DU 2  can be configured to be electrically connected via the electric cable EC 7  to the remotely located power source RPS if needed and/or desired. 
     The assist drive unit DU further comprises an assist wireless communicator WC 7  electrically connected to the assist controller DU 2 . The assist wireless communicator WC 7  is configured to wirelessly communicate with another assist wireless communicator of another component via a wireless communication channel. The assist controller DU 2  is configured to receive a control signal from another component via the assist wireless communicator WC 7 . The assist controller DU 2  is configured to receive an assist control signal CS 7  from the assist operating device MD 7  via the assist wireless communicator WC 7 . 
     At least one of the assist motor DU 1 , the assist wireless communicator WC 7 , and the assist controller DU 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 7 . In the first embodiment, each of the assist motor DU 1 , the assist wireless communicator WC 7 , and the assist controller DU 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 7 . However, only one or two of the assist motor DU 1 , the assist wireless communicator WC 7 , and the assist controller DU 2  can be configured to be electrically connected via the electric cable EC 7  to the remotely located power source RPS if needed and/or desired. 
     The assist controller DU 2  includes an assist processor DU 21 , a memory DU 22 , a circuit board DU 23 , and a system bus DU 24 . The assist processor DU 21  and the memory DU 22  are electrically mounted on the circuit board DU 23 . The assist processor DU 21  includes a CPU and a memory controller. The memory DU 22  is electrically connected to the assist processor DU 21 . The memory DU 22  includes a ROM and a RAM. The memory DU 22  includes storage areas each having an address in the ROM and the RAM. The assist processor DU 21  is configured to control the memory DU 22  to store data in the storage areas of the memory DU 22  and reads data from the storage areas of the memory DU 22 . The memory DU 22  (e.g., the ROM) stores a program. The program is read into the assist processor DU 21 , and thereby the configuration and/or algorithm of the assist controller DU 2  is performed. The assist controller DU 2  can also be referred to as an assist controller circuit or circuitry DU 2 . The assist drive unit DU can also be referred to as an assist drive circuit or circuitry DU. 
     The assist wireless communicator WC 7  is electrically mounted on the circuit board DU 23 . The assist wireless communicator WC 7  is electrically connected to the assist processor DU 21  and the memory DU 22  with the circuit board DU 23  and the system bus DU 24 . The assist wireless communicator WC 7  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the assist wireless communicator WC 7  can also be referred to as an assist wireless communicator circuit or circuitry WC 7 . 
     The assist wireless communicator WC 7  is configured to superimpose digital signals on carrier wave using a predetermined wireless communication protocol to wirelessly transmit a control signal. In the first embodiment, the assist wireless communicator WC 7  is configured to encrypt a control signal using a cryptographic key to generate encrypted wireless signals. 
     The assist wireless communicator WC 7  is configured to receives a wireless signal via the antenna. In the first embodiment, the assist wireless communicator WC 7  is configured to decode the wireless signal to recognize the assist control signal CS 7  wirelessly transmitted from the assist operating device MD 7 . The assist wireless communicator WC 7  is configured to decrypt the assist control signal CS 7  using the cryptographic key. 
     As seen in  FIG.  4   , the assist operating device MD 7  includes a master controller MC 7 . The assist operating device MD 7  includes a master assist wireless communicator MW 7 . The master controller MC 7  is electrically connected to the master assist wireless communicator MW 7 . The master assist wireless communicator MW 7  is configured to wirelessly transmit the assist control signal CS 7  to the assist wireless communicator WC 7  of the assist drive unit DU. The assist controller DU 2  is configured to receive the assist control signal CS 7  from the assist operating device MD 7  via the assist wireless communicator WC 7 . The assist controller DU 2  is configured to control the assist motor DU 1  based on the assist control signal CS 7  wirelessly transmitted from the master assist wireless communicator MW 7  of the assist operating device MD 7 . 
     The assist operating device MD 7  includes an assist user interface UF 7  configured to receive an assist user input U 7 . The master assist wireless communicator MW 7  is configured to wirelessly transmit the assist control signal CS 7  based on the assist user input U 7  received by the assist user interface UF 7 . The assist user interface UF 7  is electrically connected to the master controller MC 7 . The master controller MC 7  is configured to control the master assist wireless communicator MW 7  to wirelessly transmit the assist control signal CS 7  in response to the assist user input U 7 . In the first embodiment, the assist user interface UF 7  includes a switch SW 7  configured to be activated in response to the assist user input U 7 . The switch SW 7  is electrically connected to the master controller MC 7 . However, the assist user interface UF 7  can include other structures instead of or in addition to the switch SW 7 . 
     The master controller MC 7  includes a processor MC 71 , a memory MC 72 , a circuit board MC 73 , and a system bus MC 74 . The processor MC 71  and the memory MC 72  are electrically mounted on the circuit board MC 73 . The processor MC 71  includes a CPU and a memory controller. The memory MC 72  is electrically connected to the processor MC 71 . The memory MC 72  includes a ROM and a RAM. The memory MC 72  includes storage areas each having an address in the ROM and the RAM. The processor MC 71  is configured to control the memory MC 72  to store data in the storage areas of the memory MC 72  and reads data from the storage areas of the memory MC 72 . The circuit board MC 73  and the assist user interface UF 7  are electrically connected to the system bus MC 74 . The circuit board MC 73  and the switch SW 7  are electrically connected to the system bus MC 74 . The use interface is electrically connected to the processor MC 71  and the memory MC 72  with the circuit board MC 73  and the system bus MC 74 . The switch SW 7  is electrically connected to the processor MC 71  and the memory MC 72  with the circuit board MC 73  and the system bus MC 74 . The memory MC 72  (e.g., the ROM) stores a program. The program is read into the processor MC 71 , and thereby the configuration and/or algorithm of the assist operating device MD 7  is performed. The master controller MC 7  can also be referred to as a master controller circuit or circuitry MC 7 . 
     The master assist wireless communicator MW 7  is electrically mounted on the circuit board MC 73 . The master assist wireless communicator MW 7  is electrically connected to the processor MC 71  and the memory MC 72  with the circuit board MC 73  and the system bus MC 74 . The master assist wireless communicator MW 7  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the master assist wireless communicator MW 7  can also be referred to as a master wireless communicator circuit or circuitry MW 7 . 
     The master assist wireless communicator MW 7  is configured to superimpose digital signals such as the assist control signal CS 7  on carrier wave using a predetermined wireless communication protocol to wirelessly transmit the assist control signal CS 7 . In the first embodiment, the master assist wireless communicator MW 7  is configured to encrypt an assist control signal CS 7  using a cryptographic key to generate encrypted wireless signals. 
     The master assist wireless communicator MW 7  is configured to receives a wireless signal via the antenna. In the first embodiment, the master assist wireless communicator MW 7  is configured to decode the wireless signal to recognize signals and/or information wirelessly transmitted from another assist wireless communicator. The master assist wireless communicator MW 7  is configured to decrypt the wireless signal using the cryptographic key. 
     The control system  10  includes an electric power source PS 7 . The electric power source PS 7  is configured to supply electricity to the assist operating device MD 7 . The electric power source PS 7  is configured to supply electricity to the master controller MC 7  and the master assist wireless communicator MW 7 . The assist operating device MD 7  is configured to be electrically connected to the electric power source PS 7  configured to be remotely located from the remotely located power source RPS. The assist operating device MD 7  includes a power-source holder PH 7  configured to hold the electric power source PS 7 . The power-source holder PH 7  is configured to be detachably and reattachably hold the electric power source PS 7 . The electric power source PS 7  is configured to be detachably and reattachably connected to the power source holder. Examples of the electric power source PS 7  include a battery (e.g., a primary battery or a secondary battery). The electric power source PS 7  can include another component such as a capacitor and an electricity generation element (e.g., a piezoelectric element) instead of or in addition to the battery. 
     The assist drive unit DU further comprises a connection port CP 7  to which the electric cable EC 7  is configured to be detachably and reattachably connected such that the connection port CP 7  is electrically connected to the at least one of the assist motor DU 1  and the assist controller DU 2 . The assist drive unit DU further comprises the connection port CP 7  to which the electric cable EC 7  is configured to be detachably and reattachably connected such that the connection port CP 7  is electrically connected to the at least one of the assist motor DU 1 , the assist wireless communicator WC 7 , and the assist controller DU 2 . In the first embodiment, the connection port CP 7  is configured to be electrically connected to the assist motor DU 1 , the assist wireless communicator WC 7 , and the assist controller DU 2 . However, the connection port CP 7  can be configured to be electrically connected to only one or two of the assist motor DU 1 , the assist wireless communicator WC 7 , and the assist controller DU 2  if needed and/or desired. 
     As seen in  FIG.  4   , the assist drive unit DU includes a pedaling-force sensor DU 3 . The pedaling-force sensor DU 3  is configured to sense a pedaling force applied to the drive train  2 E from a rider. The assist controller DU 2  is configured to control the assist motor DU 1  to add the assist driving force to the drive train  2 E based on an assist ratio and the pedaling force sensed by the pedaling-force sensor DU 3 . The assist controller DU 2  is configured to select and/or calculate the assist ratio. However, the assist controller DU 2  can be configured to control the assist motor DU 1  to add the assist driving force to the drive train  2 E regardless of the assist ratio and/or the pedaling force. For example, the assist controller DU 2  can be configured to control the assist motor DU 1  to add the assist driving force to the drive train  2 E based on the assist user input U 7  received by the assist operating device MD 7 . 
     The assist drive unit DU has at least two assist modes having different assist ratios. In the first embodiment, the assist drive unit DU has a first assist mode and a second assist mode. The first assist mode has a first assist ratio. The second assist mode has a second assist ratio which is lower than the first assist ratio. In the first assist mode, the assist controller DU 2  is configured to calculate the assist driving force based on the first assist ratio and the pedaling force sensed by the pedaling-force sensor DU 3 . In the second assist mode, the assist controller DU 2  is configured to calculate the assist driving force based on the second assist ratio and the pedaling force sensed by the pedaling-force sensor DU 3 . For example, the assist controller DU 2  is configured to change the assist mode between the first assist mode and the second assist mode in response to the assist control signal CS 7 . 
     As seen in  FIGS.  2  to  4   , the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU can be configured to communicate with each other via the wired communication structure WS using power line communication (PLC) technology. More specifically, each of the electric cables of the wired communication structure WS includes a ground line and a voltage line that are detachably connected to a serial bus that is formed by communication interfaces. In this embodiment, the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU can all communicate with each other through the voltage line using the PLC technology. 
     The PLC technology is used for communicating between electric components. The PLC carries data on a conductor that is also used simultaneously for electric power transmission or electric power distribution to the electric components. In this embodiment, electricity is supplied from the remotely located power source RPS to the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU via the wired communication structure WS using the PLC. 
     The PLC uses unique identifying information such as a unique identifier that is assigned to each of the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU. Each of the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU is configured to store the identifying information. Based on the identifying information, each of the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU is configured to recognize, based on the identifying information, information signals which are necessary for itself among information signals transmitted via the wired communication structure WS. Instead of using the PLC technology, however, separate signal wires can be provided for transmitting data in addition to the ground wire and the voltage wire if needed and/or desired. 
     As seen in  FIG.  2   , the motorized component AS includes a wired communicator PC 1  configured to establish a wired communication channel such as the PLC, The wired communicator PC 1  is electrically mounted on the circuit board AS 23 . The wired communicator PC 1  is connected to the wired communication structure WS and the system bus AS 24 . The wired communicator PC 1  is configured to separate input signals to a power source voltage and control signals. The wired communicator PC 1  is configured to regulate the power source voltage to a level at which the controller AS 2  and the wireless communicator WC 1  can properly operate. The wired communicator PC 1  is further configured to superimpose output signals such as the control signal CS 1  on the power source voltage applied to the wired communication structure WS from the remotely located power source RPS. The wired communicator PC 1  can also be referred to as a wired communicator circuit or circuitry PC 1 . 
     The motorized component SS includes a wired communicator PC 2  configured to establish a wired communication channel such as the PLC. The wired communicator PC 2  is electrically mounted on the circuit board SS 23 . The wired communicator PC 2  is connected to the wired communication structure WS and the system bus SS 24 . The wired communicator PC 2  is configured to separate input signals to a power source voltage and control signals. The wired communicator PC 2  is configured to regulate the power source voltage to a level at which the controller SS 2  and the wireless communicator WC 2  can properly operate. The wired communicator PC 2  is further configured to superimpose output signals such as the control signal CS 2  on the power source voltage applied to the wired communication structure WS from the remotely located power source RPS. The wired communicator PC 2  can also be referred to as a wired communicator circuit or circuitry PC 2 . 
     The motorized component AB includes a wired communicator PC 3  configured to establish a wired communication channel such as the PLC. The wired communicator PC 3  is electrically mounted on the circuit board AB 23 . The wired communicator PC 3  is connected to the wired communication structure WS and the system bus AB 24 . The wired communicator PC 3  is configured to separate input signals to a power source voltage and control signals. The wired communicator PC 3  is configured to regulate the power source voltage to a level at which the controller AB 2  and the wireless communicator WC 3  can properly operate. The wired communicator PC 3  is further configured to superimpose output signals such as the control signal CS 3  on the power source voltage applied to the wired communication structure WS from the remotely located power source RPS. The wired communicator PC 3  can also be referred to as a wired communicator circuit or circuitry PC 3 . 
     As seen in  FIG.  3   , the motorized component FD includes a wired communicator PC 4  configured to establish a wired communication channel such as the PLC. The wired communicator PC 4  is electrically mounted on the circuit board FD 23 . The wired communicator PC 4  is connected to the wired communication structure WS and the system bus FD 24 . The wired communicator PC 4  is configured to separate input signals to a power source voltage and control signals. The wired communicator PC 4  is configured to regulate the power source voltage to a level at which the controller FD 2  and the wireless communicator WC 4  can properly operate. The wired communicator PC 4  is further configured to superimpose output signals such as the control signal CS 4  on the power source voltage applied to the wired communication structure WS from the remotely located power source RPS. The wired communicator PC 4  can also be referred to as a wired communicator circuit or circuitry PC 4 . 
     The motorized component LE includes a wired communicator PC 5  configured to establish a wired communication channel such as the PLC. The wired communicator PC 5  is electrically mounted on the circuit board LE 23 . The wired communicator PC 5  is connected to the wired communication structure WS and the system bus LE 24 . The wired communicator PC 5  is configured to separate input signals to a power source voltage and control signals. The wired communicator PC 5  is configured to regulate the power source voltage to a level at which the controller LE 2  and the wireless communicator WC 5  can properly operate. The wired communicator PC 5  is further configured to superimpose output signals such as the control signal CS 5  on the power source voltage applied to the wired communication structure WS from the remotely located power source RPS. The wired communicator PC 5  can also be referred to as a wired communicator circuit or circuitry PC 5 . 
     The rear derailleur RD includes a wired communicator PC 6  configured to establish a wired communication channel such as the PLC. The wired communicator PC 6  is electrically mounted on the circuit board RD 23 . The wired communicator PC 6  is connected to the wired communication structure WS and the system bus RD 24 . The wired communicator PC 6  is configured to separate input signals to a power source voltage and control signals. The wired communicator PC 6  is configured to regulate the power source voltage to a level at which the derailleur controller RD 2  and the derailleur wireless communicator WC 6  can properly operate. The wired communicator PC 6  is further configured to superimpose output signals such as the shift control signal CS 6  on the power source voltage applied to the wired communication structure WS from the remotely located power source RPS. The wired communicator PC 6  can also be referred to as a wired communicator circuit or circuitry PC 6 . 
     As seen in  FIG.  4   , the assist drive unit DU includes a wired communicator PC 7  configured to establish a wired communication channel such as the PLC. The wired communicator PC 7  is electrically mounted on the circuit board DU 23 . The wired communicator PC 7  is connected to the wired communication structure WS and the system bus DU 24 . The wired communicator PC 7  is configured to separate input signals to a power source voltage and control signals. The wired communicator PC 7  is configured to regulate the power source voltage to a level at which the controller DU 2  and the wireless communicator WC 7  can properly operate. The wired communicator PC 7  is further configured to superimpose output signals such as the assist control signal CS 7  on the power source voltage applied to the wired communication structure WS from the remotely located power source RPS. The wired communicator PC 7  can also be referred to as a wired communicator circuit or circuitry PC 7 . 
     Second Embodiment 
     A control system  210  in accordance with a second embodiment will be described below referring to  FIG.  5   . The control system  210  has the same structure and/or configuration as those of the control system  10  except for a position of the master electric device. Thus, elements having substantially the same function as those in the first embodiment will be numbered the same here and will not be described and/or illustrated again in detail here for the sake of brevity. 
     As seen in  FIG.  5   , the control system  210  for the human-powered vehicle  2  comprises a motorized component and a master electric device. In the second embodiment, the control system  210  comprises the motorized component AS, the motorized component SS, the motorized component AB, the motorized component FD, the motorized component LE, and a motorized component GH. The rear derailleur RD is omitted from the human-powered vehicle  2 . The rear sprocket assembly RS includes a single sprocket. The control system  210  comprises the master electric device MD 1 , the master electric device MD 2 , the master electric device MD 3 , the master electric device MD 4 , the master electric device MD 5 , and a master electric device MD 8 . The master electric device MD 8  is configured to operate the internal geared hub GH. 
     The motorized component GH is configured to change a reduction gear ratio between the rear sprocket assembly RS and the rear wheel W 2 . The motorized component GH can also be referred to as an internal geared hub GH. 
     The motorized component GH for the human-powered vehicle  2  other than the rear derailleur RD comprises an electric actuator GH 1  and a controller GH 2  configured to control the electric actuator GH 1 . 
     At least one of the electric actuator GH 1  and the controller GH 2  is configured to be electrically connected via an electric cable EC 8  to the remotely located power source RPS configured to supply electricity to the assist drive unit DU configured to assist pedaling. In the second embodiment, each of the electric actuator GH 1  and the controller GH 2  is configured to be electrically connected to the remotely located power source RPS via the electric cable EC 8 . However, only one of the electric actuator GH 1  and the controller GH 2  can be configured to be electrically connected via the electric cable EC 8  to the remotely located power source RPS if needed and/or desired. 
     The motorized component GH further comprises a wireless communicator WC 8  electrically connected to the controller GH 2 . The wireless communicator WC 8  is configured to wirelessly communicate with another wireless communicator of another component via a wireless communication channel. The controller GH 2  is configured to receive a control signal from another component via the wireless communicator WC 8 . The controller GH 2  is configured to receive a control signal CS 8  from the master electric device MD 8  via the wireless communicator WC 8 . 
     At least one of the electric actuator GH 1 , the wireless communicator WC 8 , and the controller GH 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 8 . In the second embodiment, each of the electric actuator GH 1 , the wireless communicator WC 8 , and the controller GH 2  is configured to receive electricity from the remotely located power source RPS via the electric cable EC 8 . However, only one or two of the electric actuator GH 1 , the wireless communicator WC 8 , and the controller GH 2  can be configured to be electrically connected via the electric cable EC 8  to the remotely located power source RPS if needed and/or desired. 
     The controller GH 2  includes a processor GH 21 , a memory GH 22 , a circuit board GH 23 , and a system bus GH 24 . The processor GH 21  and the memory GH 22  are electrically mounted on the circuit board GH 23 . The processor GH 21  includes a CPU and a memory controller. The memory GH 22  is electrically connected to the processor GH 21 . The memory GH 22  includes a ROM and a RAM. The memory GH 22  includes storage areas each having an address in the ROM and the RAM. The processor GH 21  is configured to control the memory GH 22  to store data in the storage areas of the memory GH 22  and reads data from the storage areas of the memory GH 22 . The memory GH 22  (e.g., the ROM) stores a program. The program is read into the processor GH 21 , and thereby the configuration and/or algorithm of the controller GH 2  is performed. The controller GH 2  can also be referred to as a controller circuit or circuitry GH 2 . 
     The wireless communicator WC 8  is electrically mounted on the circuit board GH 23 . The wireless communicator WC 8  is electrically connected to the processor GH 21  and the memory GH 22  with the circuit board GH 23  and the system bus GH 24 . The wireless communicator WC 8  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the wireless communicator WC 8  can also be referred to as a wireless communicator circuit or circuitry WC 8 . 
     The wireless communicator WC 8  is configured to superimpose digital signals on carrier wave using a predetermined wireless communication protocol to wirelessly transmit a control signal. In the second embodiment, the wireless communicator WC 8  is configured to encrypt a control signal using a cryptographic key to generate encrypted wireless signals. 
     The wireless communicator WC 8  is configured to receives a wireless signal via the antenna. In the second embodiment, the wireless communicator WC 8  is configured to decode the wireless signal to recognize the control signal CS 8  wirelessly transmitted from the master electric device MD 8 . The wireless communicator WC 8  is configured to decrypt the control signal CS 8  using the cryptographic key. 
     As seen in  FIG.  5   , the master electric device MD 8  includes a master controller MC 4 . The master electric device MD 8  includes a master wireless communicator MW 4 . The master controller MC 4  is electrically connected to the master wireless communicator MW 4 . The master wireless communicator MW 4  is configured to wirelessly transmit the control signal CS 8  to the wireless communicator WC 8  of the motorized component GH. The controller GH 2  is configured to receive the control signal CS 8  from the master electric device MD 5  via the wireless communicator WC 8 . The controller GH 2  is configured to control the electric actuator GH 1  based on the control signal CS 8  wirelessly transmitted from the master wireless communicator MW 4  of the master electric device MD 8 . 
     The master electric device MD 8  includes a user interface UF 8  configured to receive a user input U 8 . The master wireless communicator MW 4  is configured to wirelessly transmit the control signal CS 8  based on the user input U 8  received by the user interface UF 8 . The user interface UF 8  is electrically connected to the master controller MC 4 . The master controller MC 4  is configured to control the master wireless communicator MW 4  to wirelessly transmit the control signal CS 8  in response to the user input U 8 . In the second embodiment, the user interface UF 8  includes a switch SW 4  configured to be activated in response to the user input U 8 . The switch SW 4  is electrically connected to the master controller MC 4 . However, the user interface UF 8  can include other structures instead of or in addition to the switch SW 4 . 
     The master controller MC 4  includes a processor MC 41 , a memory MC 42 , a circuit board MC 43 , and a system bus MC 44 . The processor MC 41  and the memory MC 42  are electrically mounted on the circuit board MC 43 . The processor MC 41  includes a CPU and a memory controller. The memory MC 42  is electrically connected to the processor MC 41 . The memory MC 42  includes a ROM and a RAM. The memory MC 42  includes storage areas each having an address in the ROM and the RAM. The processor MC 41  is configured to control the memory MC 42  to store data in the storage areas of the memory MC 42  and reads data from the storage areas of the memory MC 42 . The circuit board MC 43  and the user interface UF 8  are electrically connected to the system bus MC 44 . The circuit board MC 43  and the switch SW 4  are electrically connected to the system bus MC 44 . The use interface is electrically connected to the processor MC 41  and the memory MC 42  with the circuit board MC 43  and the system bus MC 44 . The switch SW 4  is electrically connected to the processor MC 41  and the memory MC 42  with the circuit board MC 43  and the system bus MC 44 . The memory MC 42  (e.g., the ROM) stores a program. The program is read into the processor MC 41 , and thereby the configuration and/or algorithm of the master electric device MD 8  is performed. The master controller MC 4  can also be referred to as a master controller circuit or circuitry MC 4 . 
     The master wireless communicator MW 4  is electrically mounted on the circuit board MC 43 . The master wireless communicator MW 4  is electrically connected to the processor MC 41  and the memory MC 42  with the circuit board MC 43  and the system bus MC 44 . The master wireless communicator MW 4  includes a signal transmitting circuit, a signal receiving circuit, and an antenna. Thus, the master wireless communicator MW 4  can also be referred to as a master wireless communicator circuit or circuitry MW 4 . 
     The master wireless communicator MW 4  is configured to superimpose digital signals such as the control signal CS 8  on carrier wave using a predetermined wireless communication protocol to wirelessly transmit the control signal CS 8 . In the second embodiment, the master wireless communicator MW 4  is configured to encrypt a control signal CS 8  using a cryptographic key to generate encrypted wireless signals. 
     The master wireless communicator MW 4  is configured to receives a wireless signal via the antenna. In the second embodiment, the master wireless communicator MW 4  is configured to decode the wireless signal to recognize signals and/or information wirelessly transmitted from another wireless communicator. The master wireless communicator MW 4  is configured to decrypt the wireless signal using the cryptographic key. 
     The control system  10  includes an electric power source PS 8 . The electric power source PS 8  is configured to supply electricity to the master electric device MD 8 . The electric power source PS 8  is configured to supply electricity to the master controller MC 4  and the master wireless communicator MW 4 . The master electric device MD 8  is configured to be electrically connected to the electric power source PS 8  configured to be remotely located from the remotely located power source RPS. The master electric device MD 8  includes a power-source holder PH 8  configured to hold the electric power source PS 8 . The power-source holder PH 8  is configured to be detachably and reattachably hold the electric power source PS 8 . The electric power source PS 8  is configured to be detachably and reattachably connected to the power source holder. Examples of the electric power source PS 8  include a battery (e.g., a primary battery or a secondary battery). The electric power source PS 8  can include another component such as a capacitor and an electricity generation element (e.g., a piezoelectric element) instead of or in addition to the battery. 
     The motorized component GH further comprises a connection port CP 8  to which the electric cable EC 8  is configured to be detachably and reattachably connected such that the connection port CP 8  is electrically connected to the at least one of the electric actuator GH 1  and the controller GH 2 . The motorized component GH further comprises the connection port CP 8  to which the electric cable EC 8  is configured to be detachably and reattachably connected such that the connection port CP 8  is electrically connected to the at least one of the electric actuator GH 1 , the wireless communicator WC 8 , and the controller GH 2 . In the second embodiment, the connection port CP 8  is configured to be electrically connected to the electric actuator GH 1 , the wireless communicator WC 8 , and the controller GH 2 . However, the connection port CP 8  can be configured to be electrically connected to only one or two of the electric actuator GH 1 , the wireless communicator WC 8 , and the controller GH 2  if needed and/or desired. 
     The motorized component GH includes a hub axle GH 3 , a hub body GH 4 , a sprocket support body GH 5 , and an internal gear structure GH 6 . The hub axle GH 3  is configured to be secured to the frame  2 A. The hub body GH 4  is rotatably supported by the hub axle GH 3 . The sprocket support body GH 5  is rotatably supported by the hub axle GH 3 . The internal gear structure GH 6  is configured to couple the sprocket support body GH 5  to the hub body GH 4  to define a reduction gear ratio between the sprocket support body GH 5  and the hub body GH 4 . The electric actuator GH 1  is configured to actuate the internal gear structure GH 6  to change the reduction gear ratio in response to the control signal CS 8 . For example, the internal gear structure GH 6  includes a planetary gear structure. 
     The motorized component GH includes a position sensor GH 7  and a motor driver GH 8 . The electric actuator GH 1  is electrically connected to the position sensor GH 7  and the motor driver GH 8 . The electric actuator GH 1  includes a rotational shaft operatively coupled to the internal gear structure GH 6 . The position sensor GH 7  is configured to sense a current state of the internal gear structure GH 6 . Examples of the position sensor GH 7  include a potentiometer and a rotary encoder. The position sensor GH 7  is configured to sense an absolute rotational position of an output shaft of the electric actuator GH 1  as the current state of the internal gear structure GH 6 . The motor driver GH 8  is configured to control the electric actuator GH 1  based on the current state of the internal gear structure GH 6  sensed by the position sensor GH 7 . 
     Third Embodiment 
     A control system  310  in accordance with a third embodiment will be described below referring to  FIG.  6   . The control system  310  has the same structure and/or configuration as those of the control system  10  except for a position of the master electric device. Thus, elements having substantially the same function as those in the first embodiment will be numbered the same here and will not be described and/or illustrated again in detail here for the sake of brevity. 
     As seen in  FIG.  6   , the control system  310  for the human-powered vehicle  2  comprises a motorized component and a master electric device. In the third embodiment, the control system  310  comprises the motorized component AS, the motorized component SS, the motorized component AB, the motorized component FD, and the motorized component LE. 
     In the control system  310 , the motorized component AS for the human-powered vehicle  2  other than the rear derailleur RD comprises the electric actuator AS 1  and the controller AS 2  configured to control the electric actuator AS 1 . The motorized component AS has substantially the same structure as the structure of the motorized component AS described in the first embodiment. The motorized component AS further comprises the wireless communicator WC 1  electrically connected to the controller AS 2 . 
     The motorized component AS is configured to control a slave device in response to a control signal wirelessly transmitted from another device. The wireless communicator WC 1  is configured to wirelessly receive the control signal wirelessly transmitted from another device. 
     In the third embodiment, for example, the rear derailleur RD can also be referred to as a slave device RD. The derailleur wireless communicator WC 6  can also be referred to as a slave wireless communicator WC 6 . The slave wireless communicator WC 6  can also be referred to as a slave wireless communicator circuit or circuitry WC 6 . The motorized component AS is configured to control the slave device RD in response to the shift control signal CS 6  wirelessly transmitted from the shift operating device MD 6 . The wireless communicator WC 1  is configured to wirelessly receive the shift control signal CS 6  wirelessly transmitted from the shift operating device MD 6 . The controller AS 2  is configured to generate a slave control signal CS 9  in response to the shift control signal CS 6 . The wireless communicator WC 1  is configured to wirelessly transmit the slave control signal CS 9  to the slave wireless communicator WC 6  of the slave device RD to control the slave device RD. 
     The slave device RD is configured to shift the chain C in response to the slave control signal CS 9 . The slave wireless communicator WC 6  is configured to wirelessly receive the slave control signal CS 9 . The slave wireless communicator WC 6  is configured not to respond the shift control signal CS 6  wirelessly transmitted from the shift operating device MD 6 . The derailleur controller RD 2  is configured to control the derailleur actuator RD 1  to move the movable member RD 4  relative to the base member RD 3 . 
     In the third embodiment, the rear derailleur RD serves as a slave device, and the motorized component AS serves as a master device configured to control the slave device. However, at least one of the motorized components AS, SS, AB, FD and LE can be configured to serve as a master device if needed and/or desired. Another of the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU can be configured to serve as a slave device if needed and/or desired. 
     Fourth Embodiment 
     A control system  410  in accordance with a fourth embodiment will be described below referring to  FIG.  6   . The control system  410  has the same structure and/or configuration as those of the control system  10  except for a position of the master electric device. Thus, elements having substantially the same function as those in the first embodiment will be numbered the same here and will not be described and/or illustrated again in detail here for the sake of brevity. 
     As seen in  FIG.  7   , the control system  410  for the human-powered vehicle  2  comprises a motorized component and a master electric device. In the fourth embodiment, the control system  410  comprises the motorized component AS, the motorized component SS, the motorized component AB, the motorized component FD, and the motorized component LE. 
     In the control system  410 , the motorized component AS for the human-powered vehicle  2  other than the rear derailleur RD comprises the electric actuator AS 1  and the controller AS 2  configured to control the electric actuator AS 1 . The motorized component AS has substantially the same structure as the structure of the motorized component AS described in the first embodiment. The motorized component AS further comprises the wireless communicator WC 1  electrically connected to the controller AS 2 . 
     In the fourth embodiment, for example, the rear derailleur RD can also be referred to as a master electric device MD 1 . The derailleur wireless communicator WC 6  of the rear derailleur RD can also be referred to as a master wireless communicator WC 6 . The controller AS 2  is configured to control the electric actuator AS 1  based on a control signal CS 10  wirelessly transmitted from the master wireless communicator WC 6  of the master electric device RD. The derailleur wireless communicator WC 6  is configured to wirelessly receive the control signal CS 1  wirelessly transmitted from the master wireless communicator MW 1  of the master electric device MD 1 . The derailleur controller RD 2  is configured to generate the control signal CS 10  in response to the control signal CS 1 . 
     In the fourth embodiment, the motorized component AS serves as a slave device, and the rear derailleur RD serves as a master device configured to control the slave device. However, at least one of the motorized components AS, SS, AB, FD and LE can be configured to serve as a slave device if needed and/or desired. Another of the motorized components AS, SS, AB, FD and LE, the rear derailleur RD, and the assist drive unit DU can be configured to serve as a master device if needed and/or desired. 
     In the first to fourth embodiment, at least two devices of the master electric devices MD 1  to MD 5 , the shift operating device MD 6 , and the assist operating device MD 7  can be integrally provided with each other as a single unit. In a case where at least two devices of the master electric devices MD 1  to MD 5 , the shift operating device MD 6 , and assist operating device MD 7  are integrally provided with each other, the at least two devices can share at least one of an electric power source, a master controller, a master wireless communicator, a user interface, and other elements. 
     In the first to fourth embodiments, the control system  10 ,  310 , or  410  includes the motorized components AS, SS, AB, FD, and LE. The control system  210  includes the motorized components AS, SS, AB, FD, LE, and GH. However, the control system  10 ,  210 ,  310 , or  410  can include another motorized component if needed and/or desired. The control system  10 ,  210 ,  310 , or  410  can include only one motorized component if needed and/or desired. The control system  10 ,  210 ,  310 , or  410  can include only one master electric device if needed and/or desired. The control system  10 ,  210 ,  310 , or  410  can include only one master controller if needed and/or desired. 
     In the present application, the term “comprising” and its derivatives, as used herein, are intended to be open ended terms that specify the presence of the stated features, elements, components, groups, integers, and/or steps, but do not exclude the presence of other unstated features, elements, components, groups, integers and/or steps. This concept also applies to words of similar meaning, for example, the terms “have,” “include” and their derivatives. 
     The terms “member,” “section,” “portion,” “part,” “element,” “body” and “structure” when used in the singular can have the dual meaning of a single part or a plurality of parts. 
     The ordinal numbers such as “first” and “second” recited in the present application are merely identifiers, but do not have any other meanings, for example, a particular order and the like. Moreover, for example, the term “first element” itself does not imply an existence of “second element,” and the term “second element” itself does not imply an existence of “first element.” 
     The term “pair of,” as used herein, can encompass the configuration in which the pair of elements have different shapes or structures from each other in addition to the configuration in which the pair of elements have the same shapes or structures as each other. 
     The terms “a” (or “an”), “one or more” and “at least one” can be used interchangeably herein. 
     The phrase “at least one of” as used in this disclosure means “one or more” of a desired choice. For one example, the phrase “at least one of” as used in this disclosure means “only one single choice” or “both of two choices” if the number of its choices is two. For other example, the phrase “at least one of” as used in this disclosure means “only one single choice” or “any combination of equal to or more than two choices” if the number of its choices is equal to or more than three. For instance, the phrase “at least one of A and B” encompasses (1) A alone, (2), B alone, and (3) both A and B. The phrase “at least one of A, B, and C” encompasses (1) A alone, (2), B alone, (3) C alone, (4) both A and B, (5) both B and C, (6) both A and C, and (7) all A, B, and C. In other words, the phrase “at least one of A and B” does not mean “at least one of A and at least one of B” in this disclosure. 
     Finally, terms of degree such as “substantially,” “about” and “approximately” as used herein mean a reasonable amount of deviation of the modified term such that the end result is not significantly changed. All of numerical values described in the present application can be construed as including the terms such as “substantially,” “about” and “approximately.” 
     Obviously, numerous modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.