Article View: sci.electronics
Article #7026Re: Stepper Motor Control
From: David J W Emrich
Date: Tue, 01 Sep 1992 16:41
Date: Tue, 01 Sep 1992 16:41
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root@drdhh.hanse.de (Bjoern Kriews) writes: >Short question: >I want to drive a fourphase 12V stepper motor from a 5V HCT latch. >Is it possible to use a simple NPN transistor and to connect >the motor common lead to 12V instaed of ground ? >Will the stepper run with reversed coils ? >I'll try out but I'd like to know if I do big big NONO's :-) It'll work OK. No damage to motor, and it really makes no difference. I'll leave it to you to figure out if the direction of spin is reversed! The only thing to watch is that you put swamping diodes across the NPN transistors, so that back- emf from the coils doesn't shoot them! [dav] aka David Emrich gude@uniwa.uwa.edu.au
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!uniwa!gude From: gude@uniwa.uwa.edu.au (David J W Emrich) Subject: Re: Stepper Motor Control Message-ID: <1992Sep1.164102.1665@uniwa.uwa.edu.au> Keywords: stepper, transistor Organization: University of Western Australia References: <1992Aug30.235524.5826@drdhh.hanse.de> Date: Tue, 1 Sep 1992 16:41:02 GMT Lines: 19