Strictly speaking, a Theremin uses a pair of antennae that act as capacitors in a specific R/C circuit. Looking at [aritrakdebnath2003]’s MIDI THEREMIN, we see it works differently, but it does play ...

Pi Pico library for NeoPixel led-strip written in MicroPython. Works with ws2812b (RGB) and sk6812 (RGBW). - blaz-r/pi_pico_neopixel ...

This Cube project uses LED panels for a 3D physics simulation. The creator used ESP32, WS2812b control, and limited external libraries. The source code is available on GitHub, with a possible PCB ...