BBC Micro:Bit Expansion Breakout Board V2.0

BBC Micro:Bit Expansion Breakout Board V2.0 is a dedicated IO expansion board for Micro:bit. It exposes Micro:bit pin resources and provides a compact layout for DIY electronics projects. The board includes a built-in buzzer and a 3.5mm audio connector for audio output. It also features 5 gold fingers, a yellow and black 3-pin interface, and LEGO-mounting holes. Power and interface support is designed for 3.3V and 5V use cases, with a self-recovery fuse for protection.

The BBC Micro:Bit Expansion Breakout Board V2.0 is designed to extend IO access and simplify connections for common modules. It supports direct use of the music module in Makecode through the built-in buzzer. The board also provides a switch to change the buzzer output and the pink port output. Its small size makes it suitable for compact builds and electronics prototyping.

Features of BBC Micro:Bit Expansion Breakout Board V2.0

• Dedicated Micro:bit IO expansion
• Built-in buzzer
• 3.5mm audio connector
• 5 gold fingers
• Yellow and black 3-pin interface
• Switchable buzzer output
• LEGO-mounting holes
• Self-recovery fuse

Specifications of BBC Micro:Bit Expansion Breakout Board V2.0

• USB supply voltage: 5V DC, 1A
• Interface voltage: 3.3-5V DC
• Sensor module support: 3.3-5V DC
• Self-recovery fuse voltage: 5V
• Self-recovery fuse current: 1A
• Audio connector: 3.5mm
• Gold finger pins: 0, 3V, 1, GND, 2
• 3-pin interface: yellow and black
• Switch function: buzzer music output and pink port output
• Power input: Micro:bit USB port or battery holder
• LEGO-mounting holes: KittenBot compatible
• Size: 57x44x12mm
• USB port maximum input current: 1A

How to Use BBC Micro:Bit Expansion Breakout Board V2.0

1. Connect the board to the Micro:bit power source or an external 5V supply.
2. Attach the required IO, audio, or sensor connections.
3. Set the switch position according to the desired buzzer or IO output behavior.

More Info

• When using Micro:bit power, IO port current should be below 200mA.
• When using 5V external power, total current should not exceed 1A.
• Do not use metal products to avoid short circuits.
• P0 should be set with the buzzer switch off when used as a normal IO port.
• Do not use IO19 and IO20 as IO ports.