On 10/11/07, Sebastian Kuzminsky <[EMAIL PROTECTED]> wrote:
>
> "Jim Coleman" <[EMAIL PROTECTED]> wrote:
> > im pretty sure the 7805 5V regulator would work for ya, to provide a 5V
> > logic supply from the 24V supply, they should only be a dollar or 2 at
> > radioshack. then you could eliminate the atx supply.
>
> Heh, I just discovered the LM7805, and yeah it looks like it'd work. :-)
>
>
> > I would also
> stick in
> > a wire to ground to the chassis of the pc. i'd be afraid of the port
> sinking
> > a decent amount of current and frying out. even a wire from the parport
> > plug to a ring terminal on one of the case screws in the back should do
> the
> > trick.
>
> Are you suggesting a fat ground wire from the ground on the driver
> circuit to the case of the PC?
pretty much, in case there is some wicked ground loop, or an accident, you'd
have a current path directly to the computer's case instead of having to go
through the parallel port and across the ground traces on the motherboard.
i dont know the parallel port's limit on the ground, but i know i would feel
better having a second ground in place.
--
> Sebastian Kuzminsky
>
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