On Thu, Dec 27, 2001 at 08:09:44AM -0800, Ethan Dicks wrote:
>
> --- "James L. Rice" <jrice_at_texoma.net> wrote:
> >
> > http://www.switkin.com/software/geeklights/schem1.gif
> >
>
> Thank you. I couldn't find a link on the site.
>
> Looks like a standard ladder D-to-A and a standard comparator
> bargraph (built one once from a Heathkit surface mount course).
>
>
> I'm a little concerned about the bottom of the schematic - it looks like
> you are supposed to run -5V to ground!
No, as far is I can tell, this is just a misleading label. The whole
device is supposed to be powered from a drive power feed from the inside
of the PC. The "-5 V" label here just means "connect to ground of +5 V
supply".
Regards,
Alex.
--
q: If you were young again, would you start writing TeX again or would
you use Microsoft Word, or another word processor?
a: I hope to die before I *have* to use Microsoft Word.
-- Harald Koenig <koenig_at_tat.physik.uni-tuebingen.de> asking Donald E. Knuth
Received on Thu Dec 27 2001 - 17:07:21 GMT
