Example Code for micro:bit-Motor Control Loop with IO Expansion Board MBT0014

This article provides detailed instructions on using micro:bit for motor control loops, including software setup, wiring diagrams, and sample code for continuous motor rotation.

Software Preparation

MakeCode Online Programming Platform:
https://makecode.microbit.org
MakeCode Extension (Library) Repository:
Please copy the following library URL and paste it into the MakeCode Extensions search box:
https://github.com/DFRobot/pxt-DFRobot_creative-robotics-kit

Wiring Diagram

Insert the micro:bit with the LED matrix side facing the direction of the "micro:bit" logo, as shown in the diagram.

At this point, the expansion board supports the following features:

All IO ports
2 motor drivers
"0, 1, 2, 3V, GND" edge connector compatible with the micro:bit P0,P1,P2, 3V GND
USB and PH2.0 external power, with power switch
Buzzer and buzzer switch

Sample Code

Result

The result of the following program: Two motors rotate at speeds of 200 RPM and 100 RPM, rotating forward for 2 seconds, then backward for 2 seconds, and stopping for 2 seconds, continuously looping.

The "PYTHON" touchpads are not supported in micro:bit mode.

The buzzer uses the P0 port. To use the P0 touchpad, the buzzer must be turned off.