►Connecting Unipolar Stepper Motor

There are actually many ways you can interface a stepper motor to your controller, out of them the most used interfaces are:
  1. Interface using L293D - H-Bridge Motor Driver
  2. Interface using ULN2003/2004 - Darlington Arrays

We will dicuss both connection techniques one by one. The above mentioned methods need 4 controller pins for interface.

Connecting Unipolar stepper using L293D

Please click on the image to enlarge it

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.




Connecting Unipolar stepper using ULN2003/2004

Please click on the image to enlarge it

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 stepper motor according to the step sequece sent by the controller.

►2-wire connection for Unipolar Stepper Motor

We have seen the generally used 4-wire connection method for interfacing unipolar stepper motor, but we can simplify the design to make controller use less pins with the help of 2-wire connection method. The circuit for 2-wire connection is shown below.

[lightbox=unipolar_stepper_big.gif|Unipolar Stepper Motor connection|stepper motor connections]
[/lightbox]
Please click on the image to enlarge it


►Connecting Bipolar Stepper Motor

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:

[lightbox=bipolar_stepper_big.gif|Bipolar Stepper Motor connection|stepper motor connections]
[/lightbox]
Please click on the image to enlarge it

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. This is discussed in the next section of the tutorial.

◄ Previous Page  |  Next Page ►

DC Motor Tutorial Index
Introduction to Stepper Motors
Stepper Motor Connections
Step Sequence of Stepper Motors
Programming for Stepper Motor

Conversation

ajay_bhargav
Mon Oct 20 2014, 11:22 AM
@skrishna, please post in forum so we can help you better.
Tue Oct 14 2014, 01:45 PM
skrishna
how do i write an ALP equivalent 7segment display interfacing embedded c program (both 8051 microcontroller)
Sat Oct 11 2014, 06:41 PM
vaidehi
want details of seven segment LED display common cathode ( IC CD 4026)
Fri Oct 03 2014, 12:52 PM
Narsim
Rickey you inspired me a lot ... I am also planing like you ...
ExperimenterUK
Wed Oct 01 2014, 09:33 PM
We're back.. we had a bug, but posting is back to normal
ExperimenterUK
Sat Sep 13 2014, 04:34 PM
jaimin1212,Pimpalkhare Create a thread for your question
jaimin1212
Sat Sep 13 2014, 06:35 AM
i want to make self balancing robot using MPU6050 using atmega8.. please help to get data of gyro and accelerometer from this sensor through atmega8.
Thu Sep 11 2014, 01:00 PM
Sunil Pimpalkhare
Hello sir, I am trying to make Wearfin project https://www.youtube.com/watch?v=iZ6PVBvQf-g so can u help me in teaching how to built the program???
Thu Sep 11 2014, 06:21 AM
hariom panday
plz hlp me in my project
iec.naga
Tue Sep 09 2014, 05:19 AM
spi

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Posted By ExperimenterUK
Wed Oct 22 2014, 03:22 AM
Okay, it seems to be a simple serial connection.Th...
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I found this slightly different data sheet on a pu...
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after this Accept-language:en-us\r\n...
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@ aksharAT89C51AC3 can bebut the final decision wi...
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@ Okechukwubefore starting this project you should...
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@ kirangowleyou have to set the microphone level a...
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i didnt understand the error where is error is th...
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I found this slightly different data sheet on a pu...
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Coding on Assembly Language is attached hereCODE:....