I Colin
I have done a few things with Steppers in the past, and it will be no
problem running it with the 9V but it should be a regulated or at least have
a small ripple. you will find that your power supply probably as quit a lot
of ripple.
the lower voltage will reduce torque but from 9.2V to 9V should not be that
much of a problem.
hope it helps
Regards
        Luis

-----Original Message-----
From: Colin Constant [mailto:colinpiclist@HOTMAIL.COM]
Sent: 27 February 2004 16:44
To: PICLIST@mitvma.mit.edu
Subject: [EE:] Stepper motor voltage question


Hi,

I've got a stepper motor that's rated at 9.2V (240mA).  I'm just wondering
how picky these things are about the voltage.  Could I run it off a 9V wall
wart? Unregulated? Should I maybe add an electrolytic?

I'm using an MC3479 to drive the motor.

At the moment I'm using a 15V wall wart into an LM317 set to 9.2V, which
works OK except that the 317 runs pretty warm.

Thanks guys,
Colin

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