Yes, that is my robot. I made it in one and a half hours. It runs around on it's little motor feet, and has two functions. One is to circle around and around until it 'sees' light, which then it runs towards it. Or it just runs towards light.
IN THEORY.
In practise, cause we're using cheap photo diodes, it can't really tell what is is strong enough to be considered 'light'. So most of the time it stutters around. Turn on a room light and it goes berserk.
Xuan accidentally connected wires to opposite motors, so it ended up trying to get away from light instead. Instead of self-imploding, it just sat there..anti-climatic.
Wish it had exploded...