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: 3.5V–5.5V (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 0–3.3V 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 PickerBuild 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
