[nathan_hui]

The ring light isn't necessary, but provides the ability to concentrate light around the camera, so it's pointed at the target.

2473 used a pair of high-density LED lamps, which blinded any inspector looking at the bot, but they worked beautifully on the field (targets were completely saturated, so the lines stood out really well).

You can use the camera to automatically calculate a firing solution, if you can write the appropriate algorithms. You could simply draw a crosshairs on the DS and aim like that. The more advanced solution would be automatic target acquisition and firing.