Just wanted to share a couple pics of my first maze robot, which just took 3rd place at a work competition
Powered by a PIC 18F2685, (2) 7.2 VDC gearmotors with encoders, 3 analog line sensors, 2 digital line sensors, a Sabertooth 2X25 drive (overkill, but that's what I had).
I chose to build it a bit large because the maze track was made from pieces of wood, and the track was big (about 50' x 20').