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The micro:bit Expansion Board for Boson is a carry-on board that connects to the BBC micro:bit via edge connector, replacing crocodile clips with six keyed 3...

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The micro:bit Expansion Board for Boson is a carry-on board that connects to the BBC micro:bit via edge connector, replacing crocodile clips with six keyed 3-pin sockets. It is compatible with DFRobot's Boson and Gravity modularised electronic modules, giving access to hundreds of digital and analogue sensors and actuators.

The board also includes a 3.5mm headphone jack with volume knob for audio output, and a micro-USB port for external power to ensure stable current supply when driving multiple peripherals.

Key Features

  • 6× Keyed 3-Pin Sockets – Compatible with DFRobot Boson and Gravity modules
  • 3.5mm Headphone Jack – With onboard volume knob
  • External Power Port – Micro-USB input with on/off switch for stable 5V supply
  • Edge Connector – Plugs directly onto the micro:bit

Specifications

  • External Power – 5V via micro-USB
  • I/O Voltage – 3.3V (PH2.0 connectors and edge rings)
  • Maximum Current – 500 mA
  • Operating Temperature – 0–85°C
  • Dimensions – 80 × 70 mm
  • Weight – 48 g

Compatibility

  • BBC micro:bit (V1 and V2)
  • DFRobot Boson modules
  • DFRobot Gravity modules

Ideal For

  • Expanding micro:bit projects with sensors and actuators
  • Classroom and STEM education
  • Interactive sound, light, and motion projects

Resources

Jargon buster

Plain-language definitions for the technical terms used above.

Boson
Boson is a modular electronics system that uses plug-in cables and modules to connect sensors, buttons, displays, and controllers without much wiring. If a cable is marked for Boson, it is intended to fit that connector style and pin arrangement.
Gravity
Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.

Supplier page — dfrobot.com

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