| NES Light Gun Pin | Pin Name |
Description |
| 1 | GND | |
| 5 | Out | Shot button |
| 6 | Light | Light detection |
| 7 | +5V |
The NES shows each target on the screen replaced by a white box for a frame. The gun receives the light intensity, and returns a value on pin 6 accordingly. If the NES reads blank when a certain target was blank and reads black when the others were blank, the it knows which target you shot to.

