-----Original Message-----
From: Steve Smith <XYGAX@AOL.COM>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Sunday, November 30, 1997 13:46
Subject: Driving steper motors


>Does anybody have a simple routiene for driving steper motors (never done
it
>before) for PIC16CXX


    Don't have routines for the PIC (I only have some weird ones for the PC)
but it is pretty basic, depending on the stepper. The easiest one to drive
has four windings, to step, just put power into every winding one at a time
in the right sequence, usually you can find the right sequence with a
battery. Then for the PIC, just toggle the correct pins on and off in
sequence, inserting a delay between each step to account for the physical
speed of the motor, for a pic the delay would probably be kinda large. Of
course if you have one of the other motors, there is more electronics
outside of the PIC involved. TTYL

>I have found some incredably tiny ones in a viedo camera focousing unit
they
>are abut 8mm diameter x 10mm long with a coil resistance of 43R per winding
I
>think that they could be driven directly form a pic or certainly with a 74
>line driver from 5V or maybe 3V
>An idea from a friend about a Magic trick provoked the design of a realy
tiny
>XY device that moves a tiny magnet and fits into a small book Driving the
>stepers is the remaining hurdle between an Idea and a working illusion.