This is the copy of the Cessan C172SP compass that I make for my Home Cockpit (here you can see some pictures of the cockpit:
...Show more https://www.dropbox.com/sh/h90vffkas7392ht/AAD60eFejPBNdhhoG3ClNRbfa?dl=0).
For the movement I used a 24BJY48 stepper motor, with Arduino Mega.
In the frame I realized a slot for glue a withe led of 5mm.
Fot the back cover I realized 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).
Ciao
