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Tiggerbot

tiggerbot.jpg

Tiggerbot was my first attempt at building a robot, built when I was a freshman in college. I had very limited programming and even less electronics skill at the time, and it showed. It was named in honor of being black, orange, and stupid.

Mechanical

Tiggerbot was built from a Tamiya bulldozer kit, which proved a bit underpowered for all the stuff that was piled on top of it. The treads had very inconsistent performance depending on what type of floor they were on; it could drive straight over anything, but turning didn't really work on carpet.

Electrical

Tiggerbot had two 4xAA battery packs. The motors were driven by transistor H-bridges, and everything was controlled by a PIC16C74. This was an EPROM device and had to be cooked in UV to be erased. The sensors were a sonar and an infra-red sensor mounted together on a micro-rc-servo as well as a bump sensor. It had a 433MHz AM radio that let it talk to a computer at 4800 baud.