Why my stepper motor (28BYJ-48) not rotating and it only vibrate and has a low light indocator.
Post your test code.
Post a schematic or wiring diagram.
Post photos of the wiring.
What is the motor power source?
Re-read the how to get the most from the forum post.
It is because you have a problem with your code, your wiring or your power supply
Please post your sketch, using code tags when you do, a schematic of your project, a picture of a pencil and paper drawing is good enough, details of your power supply and the Arduino board being used
Im using arduino mega, and the stepper pins are connected to digital pins 38, 40, 42, 44, but in my code (38, 42, 40, 44)
And im using 5V aupply
Which stepper motor pins are connected to which digital pins ?
Do you see how a schematic might help ?
Here is my schematic
My third stepper motor are connected to pin 38-44, just vibrating but not rotating
You have an awful lot going on in this project. The first thing that I would do would be to confirm that I could control a single motor with nothing else connected and no other code in the sketch.
Have you done that ?
Yes, I already test it one by one, an it works fine
The other stepper motor, works fine, but when it comes to the third stepper motor, it just vibrating and not rotating, and the input leds has a low light.
Exchange the third motor with the first one. Does the problem still occur and if so is it with the motor or the motor position ?
A breadboard power supply cannot provide enough current for 3 or 4 motors.
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Im using separate power supply
So, the schematic is wrong?
No, its correct
The motor works, I think the driver is the problem
Sorry, I meant "a breadboard voltage regulator cannot provide enough current for 3 or 4 motors".