Stepper Motor Interface to Microcontroller


Posted on Feb 7, 2014

As you see in the circuit above the four pins `Controller pin 1`, 2, 3 and 4 will control the motion and direction of the stepper motor according to the step sequece programmed in the controller. As already discussed in case of L293D, Here in this circuit too the four pins `Controller pin 1`, 2, 3 and 4 will control the motion and direction of the ste


Stepper Motor Interface to Microcontroller
Click here to download the full size of the above Circuit.

pper motor according to the step sequece sent by the controller. As we have studied that, Bi-polar stepper motors has 2 different coils. The step sequence for Bipolar stepper motor is same as that of unipolar stepper motors. The driving circuit for this require an H-Bridge as it allows the polarity of the power applied to be controlled independently. This can be done as shown in the figure below: Now we have seen the methods for connecting stepper motors with your microcontroller. So keeping these circuits in mind, we will now look at the programming of microcontroller to control stepper motors.




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