Alt-BEAM Archive
Message #11602
To: beam@sgiblab.sgi.com
From: Jim Taylor ace27@icdc.com
Date: Sat, 11 Mar 2000 09:55:26 -0800
Subject: Re: Diodes in microcores
> You should know that Chui's schematics require some modification to the
PNC,
> and to the motor driver for correct operation. I'm not sure if he ever
> revised his schematics. From my experience with PNC's, I'd say use wilf's
> PNC free uCore.
>
>
> > Thanks Bruce,
> > I think I'm going to stick with the schematic Chiu has drawn and not try
> to
> > modify it to be PNC-less. I'll probably try that on another walker, but
> not
> > my first.
> >
> > So for the diode then, would a regular LED do the trick? Or do I need
> > something special?
> >
> > Thanks again,
> > Mike, AKA Flaming Headphones
> >
> >
> > >Hi, Mike. That inverter in the lower left is the (now) old fashioned
PNC
> > >that extinguishes the extra pulse you get when the microcore starts up.
> > >You need the diode to isolate the PNC after it times out.
> > >
> > >For a 4-Nv microcore, you can accomplish the same thing much easier
with
> > >a couple of diodes (and no PNC). Wilf came up with this a while back,
> > >and you should find the circuit at the Beam Heretics site.
> > >
> > >Bruce
> >
> > ICQ: 17940917
> > E-mail: headphones99@iname.com
>
>
> |___|
> -------O()O-------
> James Taylor
> URL: http://fly.to/springmeadows
>
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