The Solarbotics Sumovore Kit is a strong, modular design with over 500 man-hours of development and 21 prototypes behind it. It has more power, speed, and is less expensive than the Junun Mark III, Parallax Mini-Sumo, and Tab SumoBot. This kit features: Powerful GM8 gear motors powered by a robust L293D motor driver Four opto-reflector edge sensors (fifth edge sensor position available when using microprocessor brainboard) Two 38kHz IR emitters and detectors for opponent detection 6AA power supply Modular brain boards (discrete brainboard included, BS2 / Atmel / Stamp Stack brainboards extra) Discrete brainboard "Anti Sumo-dance" behavior (stops two sumos from spinning around each other) Discrete brainboard "Anti edge-ram" behavior (stops dual edge triggers resulting in repeated edge-charging) Discrete brainboard offers selectable sumo/line-follower modes Multiple trimpots for simple behavior tuning Modular front edge sensor / IR transmitter daughterboard 345 grams "batteries-in" finished weight (6 x AA batteries not included) Powder-coated front Steel (not Aluminum) plates available in several colours Multiple wheel colours available 32-page detailed instruction document also contains full electronic schematics, both logical and symbolic for custom modifications Extra options include: Rear-looking IR detector and emitter - great for active or passive searching Atmel Mega8L brainboard with additional breadboard space PIC 16F877 brainboard with additional breadboard space BS2 brainboard to accommodate 24-pin BS2-compatible family of microprocessors (BS2 not included) HVWTech Stamp-Stack Basic Stamp 2 clone board (mates with BS2 brainboard) User Manual (7.5Mb) PDF