JoyStick Module For Sensor Shield
On the principle, the control rod can be considered that it is organized by the two potentiometer and a button :
Two of the input value of potentiometer are respectively to show the user offset in the X and Y axis, and the type of offset is analog；the button is used to show whether the user push down button in the Z axis, its type is the digital quantity. Therefore the control rod contain a total of three input interface which are used to connect X, Y, and Z:
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