Redshirt98 shows a working compass for his Arduino Airsoft Project which is to build an MA5C Halo 3 Assault Rifle... "Finally was able to replicate the compass for the MA5C Halo 3 Assault Rifle. Powered by an Arduino Nano and an LSM303 three-axis compass sensor and displayed on a tiny OLED screen. Tried to make it exactly like the game version. It displays eight directions, always pointing back toward North.

This project is part of an exact built of an airsoft version of the MA5C that will be an actual bullpup and feature working ammo counter, compass, tac light and blowback bolt."