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.
Led 5mm yellow
Use a 220Ω resistor. if you power the led from a 5V source.
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