Description:
The Building Block Expansion Board is a wireless controller hub designed for micro:bit and UNIHIKER K10 projects. This expansion board combines portability with LEGO compatibility, featuring an integrated 18650 battery slot that powers mobile robots without USB cables. The LEGO-compatible base allows secure attachment to bricks, while plug-and-play Gravity ports enable instant connection of motors, servos, and AI cameras—eliminating complex wiring. Perfect for building line-following robots, interactive LEGO cities, AI companions, and solar-powered projects. Includes 4 DC motor ports, 4 servo ports, dual I2C connectors, and programmable RGB LEDs. Supports USB Type-C, MicroUSB, and solar charging via PH2.0 port. Compact 62mm x 88mm design fits seamlessly into robotics builds. Ideal for educational robotics, STEM learning, and autonomous mobile projects.
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 UNIHIKER 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
Applications:
- Mobile Robots: Build a line-following car or obstacle-avoiding rover that runs completely wireless.
- Interactive LEGO Cities: Motorize elevators, gates, or windmills that react to sensors.
- AI Companions: Mount a HUSKYLENS and K10 to create a pet robot that recognizes its owner.
- Solar Projects: Utilize the PH2.0 solar port to create self-charging environmental monitors.
Specification:
Controller Compatibility:
- micro:bit (V1 & V2)
- UNIHIKER K10 (Direct Plug-in)
Power System:
- Battery: Slot for 1x 3.7V 18650 Lithium Battery (User Replaceable)
- Charging: USB Type-C, MicroUSB, or Solar (PH2.0)
- Status: Onboard Power & Charging Indicator LEDs
Drive Capability:
- Motors: 4x DC Motor Ports (PH2.0)
- Servos: 4x Servo Ports (PH2.0)
Expansion Ports:
- Sensors: 2x Digital/Analog IO (Gravity Standard)
- I2C: 1x 3.3V I2C + 1x 5V I2C (Great for AI Cameras/OLEDs)
Special Features:
- LEGO-Compatible Base: Standard spacing holes
- Onboard RGB: 4x Programmable LEDs
- Dimensions: 62mm x 88mm (Compact credit-card size footprint)
Documents:
Product Includes:
- Building Block Expansion Board for micro:bit & UNIHIKER K10 x1
Shipping rates Australia wide and New Zealand
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