With an inexpensive Raspberry Pi, you can add wireless Android Auto to older cars - ones that require a wired connection to your phone. This $15 Raspberry Pi hack fixed my car's Android Auto annoyance ...

The back of the build is the Raspberry Pi Pico 2 and the TXU0104 level shifters. If you’d like to follow along at home, all the build instructions and design files are available on GitHub.

The ESP32 and Raspberry Pi Pico. The MIDI controller itself is quite fetching. It’s built with a 4 x 4 array of arcade buttons to act as triggers for MIDI notes or events.