this clever arrangement of WS2812B modules could come in handy if you’re looking to make impromptu LED panels. To control the LEDs, [Mukesh] is using an Arduino Nano and an HC-06 Bluetooth ...

The build is open-source, and designed to work with strings of 60, 120, or 180 WS2812B LEDs. An Arduino Nano is charged with running the show, capturing audio via its analog-to-digital converter.