Our team was challenged to build a robot that would perform well no matter the game element. It could only use the parts in the LEGO Minstorm kit, the TETRIX kit of parts, and the TETRIX resource kit; these are the parts available to any team that registers as a FIRST Tech Challenge team. ROBOTC and LabView code would need to be provided for the autonomous and manual portions of a match. The initial version supports one sensor.
Here is our solution to that challenge. We built two robots, so we could document every step it takes to build our robot. We have given our two robots the names PB and J.

The build instructions for these robots are on the US FIRST FTC Team Resources page. The ROBOTC and LabView code to operate these robots in autonomous and manual mode are also available on the resource page. A MATRIX version of this project is also available on the resources page. Australian FIRST Tech Challenge Team 0003 from Queensland, Australia designed the original Push Bot and documents and graciously allowed us to use their document as a basis for the TETRIX Push Bot.