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Yahboom Micro:bit Expansion Board Piano Development Board for BBC Microbit

Regular price $12.99

Shipping calculated at checkout.


This is a compact micro:bit piano expansion board, its design is inspired by the piano. It possesses 7 white note buttons, 5 black note buttons, 3 pitch buttons to switch high, medium and low tone, and 3 programmable RGB lights. It also equipped with a passive buzzer and audio output interface to support the connection of audio equipment and headphones. We also designed the blocks in this piano board. Users can control it by graphical programming and build different shapes with building blocks.


  • Unique piano shape
  • 12 note buttons, 3 pitch switch buttons,
  • Onboard 3 programmable RGB lights
  • Onboard passive buzzer and audio output interface
  • Compatible with LEGO blocks



Power supply

2 AAA battery or pin power supply (requires welding pin)

Related voltage

3.3 V (built-in boost circuit, the voltage can work stably between 2-3.6V)

Related current


Colorful programmable lights


Round function button

3 (L/M/H buttons)

Analog piano buttons

12 (7 white keys + 5 black keys)


1 buzzer + 3.5mm audio output

Package list

  • Micro:bit piano expansion board x1 
  • Battery box x1 
  • AAA battery x2 
  • Double-sided tape x1 
  • Transparent pad x5