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The sensor:bit is a breakout board for the BBC micro:bit that extends all available I/O ports into standard GVS (Ground-Voltage-Signal) pin headers. This mak...

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The sensor:bit is a breakout board for the BBC micro:bit that extends all available I/O ports into standard GVS (Ground-Voltage-Signal) pin headers. This makes it easy to connect 3 V electronic modules like LEDs, photocells, servos, and other sensors without a breadboard. The board also features a built-in buzzer and audio jack for sound output.

With 16 GVS channels, dedicated I2C headers (compatible with OLED displays, BME280, etc.), and LEGO-compatible mounting points, sensor:bit is a versatile expansion platform for micro:bit projects.

Key Features

  • 16-Channel GVS Ports – Standard 3-pin headers for connecting 3 V modules
  • Built-In Buzzer – Controlled via P0; auto-disconnects when headphones are plugged in
  • 3.5 mm Audio Jack – Listen to micro:bit audio output through headphones
  • Dedicated I2C Headers – Both male and female for OLED, BME280, and other I2C devices
  • LEGO Compatible – Mounting interface for LEGO builds
  • Silk-Screen Labelled – Each I/O port clearly marked on the board

Specifications

  • SKU – EF03415
  • Version – V1.6
  • Working Voltage – 2.7–3.3 V
  • Dimensions – 57 × 42 mm
  • Weight – 18 g

Ideal For

  • Expanding micro:bit I/O for sensor and actuator projects
  • Music and sound projects with buzzer or headphone output
  • Connecting I2C displays and environmental sensors
  • STEM education and classroom activities
Note: micro:bit is not included.

Resources

Jargon buster

Plain-language definitions for the technical terms used above.

breakout
A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
Headers
Rows of metal pins used to plug a module into a breadboard or connect it with jumper wires. Pre-soldered headers make the module easier to use straight away without needing to solder the pins yourself.
I2C
I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
OLED
OLED stands for organic light-emitting diode, a display type where each pixel produces its own light. It matters because OLED screens are thin, high-contrast and easy to read for small status displays, but they can be more sensitive to image burn-in than some other display types.
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