Hi-
Lots of stuff on the internet, here's some more:
   * control with a few IC's, and a good explanation of steppers:
     http://vv.carleton.ca/~neil/robotics/stepper/ttl.html
   * previously mentioned:  http://www.doc.ic.ac.uk/~ih/doc/stepper/
   * stepper controller using 12C509 PIC:
     http://www.beowulf.demon.co.uk/serial-stepper.html
   * stepper motors for robots: http://www.terra.es/personal4/joan.ilari/
   * stepper motor source, for example:  http://www.futurebots.com/motor.htm
Cheers, David H.

Vern Jones wrote:

> Michael,
>
> Try this site for a complete tutorial on stepper motors.
>
> http://www.cs.uiowa.edu/~jones/step/index.html
>
> Jones puts it all together in an easy to understand package...
>
> Vern
>
> michael brown wrote:
> >
> > Update
> >
> > It turns out that I *can* tie the center taps together.  Once I figured out
> > the sequencing, I was able to get my driver board to make it go. ;-)  But
> > I'm still confused as to what is the difference between a 2-phase and a
> > 4-phase vs. uni-polar and bi-polar.  I think I understand the difference
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.

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