BBC micro:bit Expansion Board V1.0

SKU: FA1077
Input Voltage

5V – 9V DC (via DC Jack) or 5V (via Micro-USB)
Output Voltage

Dual 3.3V and 5V Rails
Max Current

Typically 1.0A (depending on external power source)
Pin Pitch

Standard 2.54mm (0.1")
Dimensions

Approx. 60mm x 50mm
Compatibility

Fully supports BBC micro:bit V1.5 and V2.0+
The BBC micro:bit Expansion Board V1.0 (also known as the IO Extender) is a fundamental accessory designed to unlock the full potential of the micro:bit by breaking out its specialized edge connector into standard, easy-to-use headers. As of 2026, it remains a staple for classroom learning and industrial rapid prototyping.
Long Product Description
The BBC micro:bit Expansion Board V1.0 is the essential bridge between the micro:bit’s compact design and the vast world of external electronics. While the micro:bit is powerful on its own, its gold-plated edge connector can be difficult to interface with without specialized clips. This expansion board solves that by providing a dedicated slot for the micro:bit and breaking out all Pins (P0 through P20), power (3.3V/5V), and Ground onto a clear, labeled grid of pin headers.
Designed for durability and educational versatility, the V1.0 board allows users to connect sensors, servos, and modules using standard jumper wires. It also includes an onboard power management system, often featuring a DC jack or micro-USB input to provide the extra current required for driving motors or large LED arrays that the micro:bit alone cannot handle. Whether you are a student building your first smart home project or a business engineer testing a new sensor array, this board provides the stable, organized platform needed for professional development.
Key Features
  • Plug-and-Play Slot: Features a vertical or horizontal edge connector slot that securely holds the micro:bit (Compatible with V1.5 and V2).
  • Full GPIO Access: Breaks out all 20 pins, including specialized I2C, SPI, and UART pins, into standard 0.1″ (2.54mm) headers.
  • Onboard Power Management: Includes dedicated 3.3V and 5V power rails, allowing you to power high-voltage components like servos directly from the board.
  • Lego/Mounting Compatibility: Often designed with standardized mounting holes, making it easy to integrate into physical housings or Lego-based robotic builds.
  • Clear Labeling: Every pin is clearly silkscreened on the PCB, reducing wiring errors and making it ideal for beginners.
  • Breadboard Friendly: Many versions allow for easy jumper wire connections, eliminating the need for difficult soldering.
Usage Instructions
  1. Insertion: Gently slide your BBC micro:bit into the expansion slot with the LED matrix facing the front. Ensure it is firmly seated.
  2. Powering: Connect a power source (9V DC adapter or 5V USB) to the expansion board. This is necessary if you are using components that require 5V, like standard servos.
  3. Wiring: Use female-to-female or male-to-female jumper wires to connect external sensors to the labeled pins (e.g., P0, P1, P2).
  4. Coding: Write your code in MakeCode or Python as usual. The pin numbers on the expansion board correspond directly to the pin numbers in your code.
  5. Safety: Always check that your external components share a common Ground (GND) with the expansion board to ensure signal stability.
Q: Can this board power a motor?

The V1.0 expansion board can provide the current needed for small servos or a single low-power DC motor. However, for high-torque motors or multi-motor robots, we recommend a dedicated Motor Driver Expansion Board.

Q: Is it compatible with the newer micro:bit V2?
Yes. The edge connector footprint is identical between V1.5 and V2, so this board works perfectly with all versions of the micro:bit.
Q: Do I still need to plug the USB cable into the micro:bit to program it?

Yes. While the expansion board can power the micro:bit, the programming data must still go through the micro:bit’s own USB port unless the expansion board features a specialized bridge chip.

Q: Is this suitable for business bulk purchasing for a training center?

Absolutely. The V1.0 board is a cost-effective way to outfit a lab. It significantly reduces “wear and tear” on the micro:bit’s own edge connector. For bulk orders (100+ units), please contact our corporate sales team for tiered pricing.

Q: Can I use 5V sensors with this board?

Yes. The board provides a 5V rail. However, ensure that the signal returning to the micro:bit pins does not exceed 3.3V, as the micro:bit’s GPIO pins are not 5V-tolerant. For 5V signals, a simple voltage divider or level shifter is recommended

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