Micro:Circular LED Expansion Board

You can easily turn this board into a clock, a timer, a Lucky Turntable Game, and more! When used with the BBC micro:bit, this circular expansion board becomes a creators dream.
Make this into an egg timer by using the onboard buzzer, and turn it into a colourful spectrometer using the onboard microphone. There are two external ports, P0 and P1, so you can get more ways to play by connecting more sensors!



  • Supports USB interface, power bank or USB computer power supply.
  • Supports PH2.0 interface power supply and the battery box or lithium battery power supply.
  • 24 RGB single-line LEDs - that's 16 million colour combinations!
  • MakeCode programming
  • Onboard microphone and buzzer
  • P0 and P1 interfaces support expansion modules.
  • Ultra-thin volume, more suitable for wearable and strap applications.


  • Supply Voltage:3.5~5V
  • WS2812 Single-line RGB LEDs x 24
  • Onboard buzzer x 1
  • Onboard microphone x 1
  • Number of interfaces: IO expansion board(P0,P1)x2, PH2.0 Power Interface x1, USB power Interface x1


  • Product wiki
  • Open-source design files


  • Micro:Circular RGB LED Expansion Board x1
  • PH2.0-3pin sensor cable ×2
  • M3x4 screw ×5