This is the copy of the Cessan C172SP compass for the Cessna C 172 Home Cockpit.
For the movement I used a 24BJY48 stepper motor, with Arduino Mega.
In the frame there is a slot for glue a withe led of 5mm.
Fot the back cover there are two version, one with the socket for the controller of the stepper motor (if you want to put the board inside the compass) and one without socket if you want put the board controller outside the compass).
The complete project of the Cessna C172 home cockpit on www.simmax.it