electronics circuits diagrams,hobbyists zone

Robotics Circuits

Click here for Electronic Circuits main page
 

Super simple stepper motor controller     Click here for the circuit diagram

 The circuit shown above can be used to control a unipolar stepper motor which has FOUR coils (I've swiped it off an old fax machine). The above circuit can be for a motor current of up to about 500mA per winding with suitable heat sinks for the SL100. For higher currents power transistors like 2N3055 can be used as darlington pair along with SL100. The diodes are used to protect the transistor from transients.

Activating sequence:- 

Inputs

 

Coils Energised

D0

D1

0

0

A,B

0

1

B,C

1

0

C,D

1

1

D,A

To reverse the motor just reverse the above sequence viz. 11,10,01,00.

Alternately a 2bit UP/DOWN counter can also be used to control the direction , and a 555 multi-vibrator can be used to control the speed

 

 

 

ircuits

Home | Tutorials | Books | Newsletters | Discussion Forum | Links | Downloads | Contact

Disclaimer: All the information present on this site are for personal use only. No commercial use is permitted without the prior permission from the authors of this website. We cannot be held responsible for any errors, omissions, or damages arising out of use of information available on this web site. The content in this site may contain COPYRIGHTED information and should not be reproduced in any way without the permission from us.