Since the advent of micro:bit, its simple and practical way of programming is widely loved by makers,

students and teachers. Its sample design, coupled with a wealth of pin resources, give it infinite

possibilities. This expansion board not only leads to 9 micro: bit onboard GPIO interfaces, but also

comes with 4-way motor drives and 8 servo interfaces, of which 4-way motor drives can be reused

as 2-way stepper motor drives.

Micro:bit Driver Expansion Board adopts IIC external drive chip to control the motor and servo motor,

only takes up two IIC pins and can complete the motor and servo dual control without occupying

other resources. Using HR8833 motor driver, the maximum continuous operating current is 1.5A, it

can drive the ordinary small motor and N20 mini metal motor. Each motor port comes with a positive

and negative rotating indicator to identify the motor running direction conveniently, which is very

suitable for students and makers to make small projects. Both the extended GPIO and the servo

interface use the DFRobot _ Gravity standard interface, supporting a large number of modules and

sensors. The servo interface is directly connected to the Vin power supply, thus increasing the

supply current which can support multiple servos to work at the same time.

This expansion board supports 3.5V to 5.5V power supply. It provides a DC 2.1 plug and a wiring

terminal which can be connected directly to three dry battery boxes. It comes with a USB to DC 2.1

adapter cable, which can be powered by power bank and is more economical and environment-

friendly.

Specification

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Supply Voltage: 3.5~5.5V DC

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Digital Output Voltage: 0V / 3.3V

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Analog Output Voltage: 0~3.3V DC

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Standard Gravity Interface

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Micro: bit Interface: 9 (P0 P1 P2 P8 P12 P13 P14 P15 P16)

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Servo Interfaces x 8

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Motor Interface: DC Motor x 4 / Step Motor x 2

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Dimension: 63x58mm / 2.48x2.28in

Board Overview

Micro:bit Driver Expansion Board DFR0548 Board Overview