This motor is powered by an Arduino controlled with an LSM303 compass module from Sparkfun. When the autopilot module is started up, it first checks to see if the compass module is enabled.

The compass module may be hard to find, ... Probably a good idea to also swap out the Arduino for an MSP430 (or even just a smaller, stand-alone AVR) for even lower power usage. Report comment.

Watch the video below to learn more about this awesome DIY Arduino watch that uses a GY-87 sensor board, that offers three sensors in the form of HMC5883L for the compass, BMP085 for the pressure ...