Try-bot a sumo version

The robot:
I built this robot as a sumo version of the NXT 1.0 tribot(base).
all I did to the tribot was add a lifter to the front and move the US to a better position.
I also limited my piece usage to allow NXT 2.0 users to build this bot.

The RC opponent:
I purposed in my mind to not stop work on the program for the autonomous bot until it could beat a human controlled sumo at least 2 bouts out of 3. To accomplish this goal, I built a robot using the Power Functions system.

The Board:
The board was built using a 2' x 2' x 1/2" piece of plywood. I tacked a white sheet to it and with a compass drew a black circle. Electrical tape stretches, so I used that to go around the circle.

I don't know how to post .rbt or .ldd files, so I'll link to NXTLog where you can find them.
You can see more pictures here.

Robo Arm T-1000

Robo Arm T-1000 is a heavy duty, 5 DOF (counting the hand,) remote controlled robotic arm. it uses every single NXT and PF motor I own (6 in all,) two PF receivers, the NXT, the PF Battery Box, and the pneumatics add on set from LegoEducation. Plus a lot of other parts and pieces of Lego. The NXT powers the arm rotation and pneumatics. The PF IR system controls the elbow, wrist, hand, and lights. The lights are used to communicate with the NXT via the light sensor.