Here’s an altered PCB that gives USB control to an Ikea Dioder. This is a $50 product that comes with four strips each containing nine RGB LEDs. The stock controller has a color selection whe… ...

The RGB LED sign made by [Hans and team] over at the [Hackheim hackerspace] in Trondheim is a testament to this fact. As you would expect, the WS2812 RGB LEDs illuminate the sign.