Hi, I am putting together a small robot to compete in a "Sumo" style
competition in a few months, I have my basic algorithym worked out and have
tested it on a bread board with a 16c55 and LED's, but I am wondering what
would be the best way to detect my opponent, the competition ring is about 5
foot diameter, I am thinking using photo-transistors, I wouldn't need to
have a longer detection range than say 2 feet, anyway if someone has a web
page or knows of where I could find some good information I'd appreciate it.
 -Russ