A stepper motor based arduino project that emulates an analog instrument.
Platform is an arduino nano 328.
Use a 28BYJ-48 12VDC motor.
Power supply is 12V and input voltage range is 0..5V.
Use a mechanical or optical switch to set the reference.
You can create your own beam map here: http://ns6t.net/azimuth/azimuth.html
Video on you tube: http://youtu.be/NW60fx7oFJU