Abstract:
A power supply system includes a power board and a transmission cable. The power board provides a first voltage and a second voltage. The transmission cable transmits the first voltage to a first electronic element to activate the first electronic element to work, and transmit the second voltage to a second electronic element which has same function to the first electronic element to activate the second electronic element to work.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims priority to Chinese Patent Application No. 201510180315.3, filed on Apr. 16, 2015, the contents of which are incorporated by reference herein. 
       FIELD 
       [0002]    The subject matter herein relates to a power supply system and a power board. 
       BACKGROUND 
       [0003]    Some electronic elements, do not have a unified working voltage. For example the working voltage of some touch plates is 12V, and the working voltage of other touch plates is 5V. Thus, although different suppliers provide a same electronic element, the electronic element may have a different working voltage. Correspondingly, two different power boards may be provided to match with the two different work voltage electronic elements. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0004]    Implementations of the present technology will now be described, by way of example only, with reference to the attached figures. 
           [0005]      FIG. 1  is a diagrammatic view of a power supply system providing a first working voltage. 
           [0006]      FIG. 2  is a diagrammatic view of a power interface of the power supply system in  FIG. 1 . 
           [0007]      FIG. 3  is similar to  FIG. 1 , but with the power supply system providing a second working voltage. 
       
    
    
     DETAILED DESCRIPTION 
       [0008]    It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features. The description is not to be considered as limiting the scope of the embodiments described herein. 
         [0009]    The term “comprising” means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series, and the like. 
         [0010]      FIGS. 1 and 3  illustrate a power supply system  10  includes a power board  20 , a transmission cable  30  and an electronic element  40 . The working voltage of the electronic element  40  is a first working voltage or a second working voltage. The power board  20  is configured to provide a first voltage and a second voltage. The first voltage is equal to the first working voltage. The second voltage is equal to the second working voltage. The transmission cable  30  connects the power board  20  to the electronic element  40 . The transmission cable  30  is configured to transmit the first voltage to the electronic element  40  when the working voltage of the electronic element  40  is the first working voltage and transmit the second voltage to the electronic element  40  when the working voltage of the electronic element  40  is the second working voltage. 
         [0011]    The power board  20  includes a power unit  22 , a power converting unit  24  and a power interface  26 . The transmission cable  30  includes a cable body  32  and a converting interface  34 . The power unit  22  is configured to provide the first voltage. The power converting unit  24  electrically connects the power unit  22 . The power converting unit  24  is configured to convert the first voltage to the second voltage.  FIG. 2  illustrates the power interface  26  includes two first voltage input terminals VCC 1  and two second voltage input terminals VCC 2 . The two first voltage input terminals VCC 1  are configured to receive the first voltage from the power unit  22 . The two second input terminals VCC 2  are configured to receive the second voltage from the power converting unit  24 . The power interface  26  further includes a data input terminal D+, a data out terminal D− and a number of grounded terminals (not shown). 
         [0012]    The converting interface  34  includes a number of terminals corresponding to and connected to the number of terminals of the power interface  26 . The cable body  32  includes two first wires  36  and two second wires  38 . The two first wires  36  are connected to the first voltage input terminals VCC 1  through the converting interface  34 . The two first wires  36  are configured to transmit the first voltage to the electronic element  40  when the work voltage of the electronic element  40  is the first work voltage. The two second wires  36  are connected to the second voltage input terminals VCC 2  through the converting interface  34 . The two second wires  36  are configured to transmit the second voltage to the electronic element  40  when the working voltage of the electronic element  40  is the second working voltage. The cable body  32  further includes two data wires  35 . The two data wires  35  are connected to the data input terminal D+ and the data out terminal D− through the converting interface  34 . The two data wires  35  are configured to transmit data to the electronic element  40 . The cable body  32  further includes a number of grounded wires (not shown). 
         [0013]    In one embodiment, the electronic element  40  is a touch panel. The first working voltage is 12V. The second working voltage is 5V. The first voltage provided by the power unit  22  is 12V. The power converting unit  24  converts the 12V to 5V. When the working voltage of the electronic element  40  is 12V, the two first wires  36  are connected to the power port of the electronic element  40  to provide 12V to the electronic element  40 . Thus, the electronic element  40  can work. When the working voltage of the electronic element  40  is 5V, the two second wires  38  are connected to the power port of the electronic element  40  to provide 5V to the electronic element  40 . Thus, the electronic element  40  also can work. 
         [0014]    The embodiments shown and described above are only examples. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the details, including in matters of shape, size, and arrangement of the parts within the principles of the present disclosure, up to and including the full extent established by the broad general meaning of the terms used in the claims.