Newsgroups: comp.robotics
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From: mcintyre@vnet.ibm.com (Dave McIntyre)
Subject: Re: Small 12v stepper motors 
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Date: Thu, 27 May 1993 15:36:47 GMT
Reply-To: mcintyre@vnet.ibm.com (Dave McIntyre)
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|> 	Does anybody know of a source of small 12V stepper motors.  I am
|> also looking for books or information on driving stepper motors
programatically
|> from a small CPU.  I hope to use some I/O lines from a single board computer
|> to drive amplified circuits to each of the stepper windings.  This amplifier
|> circuit is where I draw a blank.

Digikey sells a number of small Seiko-Epson stepper motors, including several
in the 12V range.  They are between $15 and $18 each, and can be bought in
small quantities (like 1) from them.  Digikey ships quickly.  I got my
motors 48 hours after calling them.

I just set up a motor circuit last night using the UCN5804B stepper motor
chip from Allegro.  Works great!  Hook up the motor, hook up the computer,
fire away.  You have 2 basic inputs: direction and step.  Cycle the step
line and the motor takes a step.  No external circuitry needed (maybe 4
diodes for bigger motors).  Neato!  You can get these chips from 
Newark or Pure Unobtanium, which advertises in CCInk.


 Dave "dr question" McIntyre   +-----+   "....say you're thinking about a plate
 mcintyre@vnet.ibm.com         |  ?  |    of shrimp.....and someone says to
 office : 607-751-2891         +-----+    you 'plate,' or 'shrimp'......"
