Russell McMahon wrote:

> In one design I drive a small unipolar stepper similar to this one
> with a ULN2803 darlington driver with built in diodes and I leave the
> common diode point open. In this case the driver is happy. YMMV :-).

  I'm not sure what you're saying here?  Wouldn't you want to tie it to
a 2xVcc rail like you just described?
--
  Cheers,
        Paul B.