Alt-BEAM Archive
Message #11570
To: beam@sgiblab.sgi.com
From: "Jim Taylor" ace27@icdc.com
Date: Thu, 9 Mar 2000 03:54:55 -0500
Subject: [alt-beam] 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
Home