Simple 35$ robot
It is my first homemade robot with microcontroller. I found some schematics in the internet and made some changes. It is controlled with Attiny 2313, robot has two servos and three wheels, uses IR sensors to navigate in the rooms. If you interested in this project you could find more information from the links in the right side (sorry, but that sites in the lithuanian language, so I sugesting use a google translate).
If you have any questions, please feel free to ask. :)