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.
You can use the Joystick shield sits on top of your Arduino and turns it into a simple controller. 7 momentary push buttons and a two-axis thumb joystick gives your Arduino functionality on the level of old Nintendo controllers.
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