[Jeremy] really wants to compete in some sumo bot wrestling, and in order to have robotic sumo wrestling one needs to make some robots, which is what [Jeremy's] build log is all about.
The framework is made out of 6mm thick Sintra (which is a type of closed cell pvc foam sheet) with the use of a CNC machine, using a “sliced” design style framework. Two geared motors fit snug inside of the internal frame and some wheels from solarbotics are attached to the ends. The arrangement of the drive wheels in the rear, and the large front end, seems like good design for the end application where robots doing turtle flips would be no fun.
Keeping in mind this is not a fully finished project and therefore does not have code or schematics posted, the brains of this beast are in a similar state, and should be pretty easy to figure out. The thinking is handled by an atmega328, and fed by IR sensor pair’s to detect light / dark patterns on the floor or table, and an array of proximity sensors along the front and sides to detect its opponent.
And while this project may not be completed, it at one point was dead and set aside, after some months [Jeremy] went back for a second look and found out that the only thing dead about it was the power regulator and h-bridge and quickly got it back up and working, which is a good reminder to not give up, even when it does go poof.