Take the ESP32-CAM, a board that started appearing on the market in early 2019. On paper, the thing is amazing: an ESP32 with support for a camera and an SD card, all for less than $10.

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 ...