Building Block Expansion Board for micro:bit & UNIHIKER K10 (Wireless & LEGO-Ready)

The Building Block Expansion Board is a versatile wireless controller hub compatible with micro:bit, UNIHIKER K10, and UNIHIKER M10. Unlike standard breakout boards, it features a built-in 18650 battery slot that eliminates dependence on USB cables, making it indispensable for mobile robotics. With a LEGO-compatible base and plug-and-play Gravity ports, electronics can be snapped directly onto bricks to connect motors, servos, or AI cameras instantly—removing the need for complex wiring.

Compatibility Note: This version is designed for micro:bit and UNIHIKER K10. If you are using UNIHIKER M10, you require a specific data cable for connection. Please purchase the [M10 Bundle Kit] instead.

Figure: Building Block Expansion Board compatible with UNIHIKER K10 and micro:bit.

Cable-Free Mobility

A robot is not truly "mobile" if tethered to a power source. This board addresses this limitation with an integrated rechargeable 18650 battery holder, capable of powering both the main controller and high-torque motors simultaneously. Additionally, the support for solar charging enables the creation of fully autonomous outdoor projects.

Seamless LEGO Integration

The design eliminates the need for adhesives or tape to attach electronics. The bottom of the board features a standard LEGO-compatible base, allowing it to snap securely onto beams and plates. This structural integration transforms the electronic module into a seamless part of the mechanical build.

Figure: DIY LEGO robot projects built with micro:bit and expansion board: tank, robotic arm, forklift, and helicopter.

3-in-1 Compatibility

Compatible with the classic micro:bit as well as the powerful UNIHIKER K10, this single board offers broad hardware support. It serves as a standardized platform for educational environments or workshops that utilize multiple types of controllers.

Figure: Top view of Building Block Expansion Board