An Arduino Pro Mini is more than up to the task, and a custom PCB makes for a fairly neat installation.

The creator of the Arduino RF Pro Mini open source development board Etienne, explains a little more about the inspiration behind the project. “ I’ve loved Arduino for years.

Mini Arduino DIY CNC drawing machine. ... The tiny CNC plotter uses an Arduino Nano and two L293D ICs mounted to a custom PCB. ... AirPods Just Got a Pro-Level Upgrade.

An Arduino Pro Mini drives an LSM303DLHC compass/accelerometer breakout board and a 12-LED NeoPixel ring. The heading is indicated with a red ‘Pixel between two yellow ones.