WS2812B Addressable RGB Strip

Light up dozens of full-colour LEDs with a single MCU pin — one-wire timing, on-chip drivers, and a 24-bit colour per pixel.

Difficulty: Breadboard. Estimated build time: about 25 minutes. Estimated parts cost: about US$8.50. 6-part bill of materials with live supplier pricing. A chain of addressable RGB LEDs that any microcontroller can control over a single data wire.