Connecting 3 unipolar 28BYJ-48 steppers to Uno

Using Arduino Motors, Mechanics, Power and CNC
#1

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!

#2

Check out the Stepper library.

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

#3

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)

#4

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