Product: Tegg 2 PCS KY-040 360 Degree Rotary Encoder Module Brick Sensor clickable Switch with Knob Cap for Arduino
Brand: Tegg
Description: 
 Type: KY-040 Rotary Decoder Encoder. 
 Operating Voltage: 5V. 
 One round number of pulse: 20. 
 Width: 19mm/0.75 Inches. 
 Length: 30mm/ 1.18 Inches. 
 Height: 28mm/1.10 Inches. 
 Material of Knob Cap: Aluminium Alloy. 
 Diameter of Knob Cap: 14mm/ 0.55 Inches. 
 Height of Knob Cap: 17mm/ 0.67Inches. 
 Package:2 PCS. 

 Pin description: 
 CLK - equivalent to output A in regular encoder. 
 DT - equivalent to output B in regular encoder. 
 GND - equivalent to output C in regular encoder. 
 SW - reset switch. 
 + (VCC) - positive supply to the unit. 

 The KY-040 rotary encoder is a 360 degree rotary input device (i.e. a control knob) that provides an indication of how much the knob has been rotated AND which direction it is rotating in. 
 It is a great device for stepper and servo motor control. You can also use it to control devices like digital potentiometers. It is ideal for navigating menus on a display or taking inputs such as numbers or text characters. The range of input can be easily defined and mapped in software. A push button switch is built into this encoder. 
 If you push on the shaft, the normally open switch "SW" will close. This can be used as an On/Off switch, to change control functions, ranges, selecting a menu item or entering a number. The "D" shaft of the encoder can be fitted with a knob for using it in a product.

Type: KY-040 Rotary Decoder Encoder.
Operating Voltage: 5V. One round number of pulse: 20.
Size: 30x19x28mm/1.18x0.75x1.10 Inches(LxWxH). Package:2 PCS.
Unlike rotary potentiometer count, the rotation counts are not limited.
With the button on the rotary encoder can be reset to its initial state, that starts counting from 0.

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