The Multi Function Expansion Board for UNIHIKER K10 and Micro:Bit is a comprehensive development platform designed to simplify robotics and motion-based projects. By integrating a 4-channel DC motor driver, multiple servo interfaces, and an onboard power management system, this board eliminates the need for multiple modules and complex wiring. It enables users to build mobile robots, smart vehicles, and interactive prototypes with efficient control and seamless integration. The inclusion of an 18650 battery holder allows portable operation, making it ideal for untethered and field-based applications.
Engineered for versatility and rapid prototyping, this expansion board offers extensive I/O connectivity along with LEGO-compatible mounting for easy mechanical integration. It supports both UNIHIKER K10 and Micro:Bit platforms, making it suitable for students, educators, and developers working on IoT, robotics, and STEM projects. With its compact design and all-in-one functionality, it provides a reliable solution for advanced motion control and embedded system development.
Key Features
- 4-Channel DC Motor Driver: Enables control of multiple motors for robotics applications
- 6 Servo Ports: Dedicated interfaces for precise servo motor control
- Dual Platform Support: Compatible with UNIHIKER K10 and Micro:Bit
- Onboard Power System: Integrated 18650 battery holder for portable operation
- All-in-One Design: Combines motor control, power management, and I/O expansion
- LEGO-Compatible Mounting: Simplifies mechanical assembly and prototyping
- Rich I/O Expansion: Supports sensors, actuators, and external modules
- Compact and Efficient: Ideal for mobile robots and embedded projects
Integrated Robotics Driver & Power Management
The expansion board acts as the main center for robotics projects. It includes a four-channel DC motor driver and six servo ports, allowing it to manage multiple complex mechanical systems at once. The servo interface is powered by an independent battery supply, ensuring steady performance even under heavy loads. The onboard 18650 battery holder, which includes a charging and discharging circuit and a multi-level power indication, converts any project into a portable, untethered gadget, greatly increasing mobility and real-world application potential.
Solve Power Supply Issues
Integrated 18650 battery holder and charging/discharging circuit, eliminating the need for cables and external batteries, while the on-board battery indicator light ensures safe power supply, convenient charging, and long battery life, greatly improving project mobility.
Figure: Expansion Board With UNIHIKER

Rich I/O & Peripheral Expansion
To solve mainboard pin constraints, this expansion board adds a plethora of new interfaces while passing through the UNIHIKER's native edge connection. It includes six multi-function I/O pins (Digital, Analog, and 1-Wire), numerous I2C ports (including one 5V port for logic-level compatibility with devices such as the HUSKYLENS), and a special 5V port for ultrasonic sensors. Furthermore, inbuilt peripherals, such as two programmable RGB LEDs and an IR transmitter/receiver, provide built-in status indication and remote control without the need for additional modules.
Figure: UNIHIKER Expansion Board With Various Connected Modules

Compatible With LEGO
The extension shield is designed for creative and speedy prototyping, with M3 mounting holes spaced ideally to match LEGO® Technic proportions. This design enables seamless and robust integration into specialized mechanical structures, robotic chassis, and instructional models. It bridges the gap between electronics and mechanical design, allowing for the fabrication of sophisticated, custom-built robots and devices.
Figure: UNIHIKER Board Mounted On LEGO Bricks

User-Friendly & Protective Design
The expansion board has been intended to be both clear and durable. A complete set of status indicators gives real-time input on system power, charging status, battery level, and motor direction, making it easier to troubleshoot and operate. All interfaces are clearly labeled and color-coded to facilitate intuitive connections. To ensure safety, an acrylic base plate is included to prevent short circuits, and all I/O pins are ESD protected for increased dependability during development.
Package Content:
- UNIHIKER Multi-function Expansion Boardx1