The Micro Magician robot controller is the perfect choice for small / low voltage robot projects. This low cost Arduino compatible controller is packed full of features:
Small size of just 60mm x 30mm
Supply voltage from 4.5V to 9V with 3.3V regulator and reverse polarity protection
ATmega168 MCU at 8MHz
Dual 1A FET “H” bridge with electronic braking, current limiting and overload detect
3 axis accelerometer with 0G detection and either 1.5G or 6G full range sensitivity
38KHz IR receiver with signal detection LED
Up to 8 servos can plug directly into the controller when V+ is set to Battery
3.3V and GND outputs available for powering sensors
All I/O pins (except D4) have both male and female header pins