Inside is Arduino Pro Micro and a PMW 3389 optical sensor on a breakout board. [Ben] was going to use flexible 3D printed panels as mouse buttons, but then had an epiphany — why not use keyboard ...

A DIY macro pad powered by an Arduino Pro Micro, featuring mechanical switches, and a rotary encoder. Built to explore hardware development and expand beyond software.

Hardware This was developed on an Arduino Pro Micro. The table below contains the pinout for the connector on the G29 Shifter, as well as the Arduino.

Arduino Micro has some extra leds that it is tricky to programme. Like almost all Arduinos, has a built-in led - the green one on the left in the photo.

PD Micro is the first Arduino-compatible board with USB Type-C Power Delivery, which allows your project to make use of voltages from 5-20 V.

The Arduino reads the state of the turn signal switches, and if they flick on momentarily it changes the pin from an input to an output and brings it high for three seconds.