Resources
User Guide

Driver Expansion Board For micro UNIHIKER M10 And K10 With Motor Servo And GPIO Control
The micro: Driver Expansion Board is a versatile control and expansion platform designed for BBC micro, UNIHIKER M10, and K10 development boards. It significantly expands the capabilities of these controllers by providing access to onboard GPIO resources along with integrated motor and servo control functions. The board features 9 GPIO expansion interfaces, 4 DC motor drive channels, and 8 servo interfaces, enabling users to build robotics, automation systems, educational projects, and interactive devices with minimal wiring and programming complexity.
Powered by an I2C motor and servo control architecture, the expansion board uses only two I2C pins while retaining valuable GPIO resources for sensors and peripherals. The integrated HR8833 motor driver supports continuous operating currents up to 1.5A and can drive small DC motors, N20 metal gear motors, and stepper motors through its configurable motor outputs. DFRobot Gravity interfaces are provided for both GPIO and servo connections, ensuring compatibility with a wide range of sensors and modules. Multiple power input options, including DC barrel jack, screw terminal, and USB-to-DC adapter support, provide flexibility for portable and educational applications.
Key Features

Compatible with micro, UNIHIKER M10, and K10: Flexible development platform support.
9 GPIO Expansion Ports: Provides additional input and output connectivity.
4 DC Motor Driver Channels: Supports motor control applications.
2 Stepper Motor Support: Motor channels can be configured for stepper motors.
8 Servo Interfaces: Enables simultaneous control of multiple servos.
I2C Motor and Servo Control: Uses only two controller pins.
HR8833 Motor Driver: Supports up to 1.5A continuous current.
Motor Direction Indicators: Visual forward and reverse rotation indication.
Gravity Standard Interfaces: Compatible with DFRobot sensors and modules.
High Current Servo Power Supply: Supports multiple servos operating simultaneously.
Wide Power Supply Range: Supports 3.5V to 5.5V input.
Multiple Power Input Options: DC barrel jack, terminal block, and USB adapter support.

Applications

Educational robotics
STEM learning projects
Robot car development
Servo control systems
Motor control applications
Automation projects
Smart devices
Interactive electronics
Engineering education
Sensor integration projects
Prototype development
Maker and DIY projects

Board Overview

Package Includes

Micro: bit Driver Expansion Board x1
USB to DC2.1 converter cable x1