Create a Simple Digital Compass for Your Car
The compass is a convenient addition to your vehicle, so you always know which direction you are looking in without relying on GPS. Many cars come with a built-in compass, but if you don’t have one, Instructables user DaAwesomeP will show you how to make your own.
The project uses an Arduino Pro Mini, a small magnetometer, a small OLED screen, and a few other details. After all, you can just plug the compass into your car’s cigarette lighter and hit the road.
DIY Digital Compass | Instructables