Dan Fisher created this Atmel ATMEGA328P-based controller board to mash-up laser tag and battle bots:

Battlebots – laser tag style!

This is my version of a control board for this project from Make Magazine. It uses dual H-bridges ICs (SN754410) to drive each motor (channels are doubled for up to 2A continuous current per motor, 4A peak for very short times). Power LED. Also 8 LEDs run by a 74LS595 shift register for “blinky” fun! Photoresistor allows for a laser hit to be detected and affect the omnibot.

fisher0251 has shared the board on OSH Park:

Omnibot control board, Rev. A