SKSumo, This is my first mini sumo robot Frame Materials: - MDF construction Drive train: -2 hacked standard servo's used the H_bridge of the servo - 6AA rechargeable batteries Sensors: - 2 IR detectors (IS471) - 2 fotodiodes for line sensors Output devices: - Piezo element (sound) CPU: PIC 16F876A with bootloader Programming Language: Pic Basic for more pictures and information: http://users.pandora.be/sks/Robots/index.htm Email: kstevens@pandora.be