| Pin | Function |
|---|---|
| 1 | Button 1 |
| 2 | Button 2 |
| 3 | Button 3 |
| 4 | Button 4 |
| 5 | Horizontal pot |
| 6 | Vertical pot |
| 7 | +5v |
| 8 | GND |
| 9 | -5v |
The joystick potentiometers work by voltage division between -5V and +5V. Actually, it uses a couple of resistors on each side to make it more like -3.4V to 3.4V.
| Vertical | Horizontal | ||
|---|---|---|---|
| Pin 6 | Pin 5 | ||
| Up | +3.4v | Left | -3.4v |
| Center | 0v | Center | 0v |
| Down | -3.4v | Right | +3.4v |