Hobby Stepper Motor

Stepper motors give you a very precise movement of a number of steps. They are used in things like 3D printers, CNC machines, etc.

Stepper motors can be expensive. A cheap option is the 28BYJ-48. It can’t be driven from the standard motor connections on the Kitronik, but it comes with its own motor driver board.

Wiring

Connect the multi-coloured cable from the motor to the special motor driver:

Using female-female wires, connect the pins on the motor driver to the microbit as follows:

Stepper	micro:bit Connection
IN1	P13
IN2	P14
IN3	P15
IN4	P16

The stepper motor uses a lot of power, so connect 4xAA batteries to the power connector on the motor driver.

The completed wiring should look like this:

Coding

To use the stepper motor you need to add the extension.

To add the extension, first click on Extensions:

Then find and click on the extension:

You should see the following block:

Enter the following code:

Download the code to the microbit.

The motor should turn 100 steps.