Connecting 3 unipolar 28BYJ-48 steppers to Uno

Hi all,

I'm pretty new to Arduino so pls give as detailed explanations as possible, preferably with drawings if possible. Thank you.

How do I wire 3 unipolar 28BYJ-48 steppers to an Arduino Uno, controlled by 3 ULN2003 drivers. I need 2 of them to move in unison, and the last independently.

Also it could be great if you have the code for control to share!

Check out the Stepper library.

You will need an external power supply and drivers for the steppers. The Stepper library page show some drivers.

Connect 5V power to all UNL2003 cards.
Connect 5V power Gnd to all ULN2003 cards, and to Arduino Gnd.
Connect 4 signals from Arduino the first motor.
4 more to the 2nd.
4 more to the 3rd.

Then use the Stepper library
https://www.arduino.cc/en/Reference/Stepper
The attached was for a '1284P with more IO, you can reduce it for the Uno with less IO.

Atmega1284P_7motor_arrays.ino (2.46 KB)

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