The Micro:Driver Expansion Board is a versatile motor and servo driver board designed for micro:bit, UNIHIKER M10, and K10. As a comprehensive Micro:Driver Expansion Board solution, it is ideal for educational robotics and DIY smart projects. This motor and servo driver provides 9 GPIO ports from the micro:bit plus 4 motor ports and 8 servo ports, allowing up to 2 stepper motors using multiplexing. The Micro:Driver Expansion Board ensures that your micro:bit projects have all the power they need.

The board uses an I2C-based HR8833 motor driver, supporting a max current of 1.5A, powerful enough to drive N20 and small DC motors. This Micro:Driver Expansion Board minimizes GPIO usage by requiring only 2 I2C pins, leaving other resources available for sensors and modules. The extended GPIO and servo headers on this motor and servo driver follow the Gravity interface, ensuring compatibility with a wide range of DFRobot modules and sensors for your micro:bit applications.

Features

• Micro:Driver Expansion Board is compatible with micro:bit, UNIHIKER M10, K10, and similar controllers

• Supports 4 DC motors / 2 stepper motors (shared with motor interface) via the motor and servo driver circuitry

• 8 servo interfaces with 5V power supply on the Micro:Driver Expansion Board

• Uses I2C communication saves GPIO resources for the micro:bit

• Built-in HR8833 motor driver, 1.5A continuous current

• Compatible with DFRobot Gravity sensors and the Micro:Driver Expansion Board ecosystem

• Works with educational programming tools (MakeCode, Mind+) for micro:bit

• USB to DC 2.1 power adapter included with the motor and servo driver

• Supports 3.5V to 5.5V input via batteries or USB to power the Micro:Driver Expansion Board

Technical Specifications

• Power Input: 3.5V5.5V (Micro:Driver Expansion Board supply)

• Motor Driver Chip: HR8833 motor and servo driver

• Max Continuous Current: 1.5A

• Digital I/O Ports: 9 (from micro:bit)

• Servo Ports: 8 3-pin (standard) on the Micro:Driver Expansion Board

• Motor Ports: 4 DC / 2 stepper (multiplexed) for motor and servo driver applications

• Communication: I2C (saves micro:bit pins)

• Dimensions: 63 58 mm (2.48 2.28 in) Micro:Driver Expansion Board

• Output Voltage: Digital 0V/3.3V, Analog 03.3V

Application Scenarios

• STEM and robotics classrooms using the Micro:Driver Expansion Board

• Mini AI robots with UNIHIKER or micro:bit driven by motor and servo driver

• Multi-motor controlled vehicles or arms with Micro:Driver Expansion Board

• Interactive smart devices using Gravity sensors and micro:bit controllers

Example Project

Ping Pong Ball Picker HuskyLens AI Robotic Ball Picker
Build an autonomous robot to collect table tennis balls using the Micro:Driver Expansion Board, servo motors, and vision modules for micro:bit. This motor and servo driver setup is perfect for robotics challenges or AI education demos.

Shipping List

• 1 Micro:Driver Expansion Board

• 1 USB to DC2.1 Converter Cable for motor and servo driver power

Reference

Product wiki for Micro:Driver Expansion Board

More Documents for micro:bit motor and servo driver