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.

Switch it on, set it down, and the sundial spins around on a continuous-rotation servo until the HMC5883L compass module finds the north-south orientation.

Arduino Nano 33 BLE Sense is a nano-sized board with Bluetooth connectivity and well equipped with sensors which include a 9-axis inertial measurement unit (IMU) which adds a compass to the usual ...