Hi James, I have similar observations. There are integrated circuits chips we can use that have all the required components on board. The 28BYJ is a small, cheap, 5 volt geared stepping motors. If you use a different setup driver, motor, source code, etc. Stepper motors can turn out very complicated, therefore, it is not that easy to look up this number. Your email address will not be published.

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Arduino + Stepper (ULNA) |

First, we set the speed to one revolutions per minute. The real problem for me is finding the hardware!! Yes, the direct link is on the page I posted above. If the two coils are A and B, then you are supposed to initialize them like this: The code above will not stepper this motor to its limit. But this time, we set the speed to etepper rounds per minute and move the shaft in the other direction by setting a negative number of steps.

That is all I can think of right now…. Stepper motors can turn out very complicated, therefore, it is not that easy to look up this number. Or I have to modify the code?

Hi, Thank you for this great tutorial!

I would like to know what type of small errors sum up bringing the robot to fall off the table: The 28BYH datasheet specifies that the preferred method for driving this stepper is using the half-step method, where we first power coil 1 only, then coil 1 and 2 together, then coil 2 only and so on…With 4 coils, this means 8 different signals, like in the table below. The default stepper library that comes pre-installed with the Arduino IDE uses this method.


Where the heck do you get yours from? Even further, stacking one chip on top of another, both electrically and physically, has been done. Would you please let me know woth suggestions?

28BYJ Stepper Motor with ULN driver and Arduino Uno |

I just recently received 2 off these stepper motors from amazon and was looking for more information on them. Where does that weird This link that is referenced in the post as well. In order to get better accuracy you will need what is called a closed loop system, where you have an independent way to measure the distance traveled with, for example, a wheel encoder.

I have to connect 5v to both the 2 normally jumpered pins before anything happens.

How do you limit the current in your application to avoid damages to mtor motor? I have 4 real rotations per minute, but 14 seconds per one rotation — so as further I move, it goes slower?

I may not have it installed at all, I think I just copied the code posted, not sure how or steper to go for the accel library installation. It runs the 28BYJ steppers very efficiently they never go as hot as with the other options I tried and also supports acceleration which allows the stepper to get to a higher speed. After some messing around with the documentation and the examples I got everything up and running.


Let me know, if I can help you any further! The drivers can be paralleled for even higher current output. There are integrated circuits chips we can use that have all the required components on board.

Tutorial: How to drive the 28BYJ-48 stepper motor with a ULN2003A driver board and an Arduino Uno

Got it through Github. My first guess woud be IN Thank you for this very clear tutorial and for the video. It features common-cathode flyback diodes for switching inductive loads. In particular, stepper motors are driven step by step.

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I have the question, if you have an overview for all commands of the library and what they do. Below is the code that will slowly accelerate the 28BYJ in one direction, then decelerate to a stop and accelerate in the opposite direction.