Alt-BEAM Archive
Message #10784
To: beam@sgiblab.sgi.com
From: Bruce Robinson Bruce_Robinson@telus.net
Date: Wed, 23 Feb 2000 22:16:30 -0800
Subject: [alt-beam] ... one more thing ...
Oops, forgot this in my preliminary troubleshooting list. In that PNC
circuit I described, you'll notice that while all the Nv neurons use
0.22 uf capacitors, the Nu neuron on the bottom left of the diagram uses
a 2.2 uf cap -- 10 times as large. It doesn't show up all that clearly
on my diagram.
The theory is, you want the PNC circuit to wait long enough for a pulse
to circulate one around the Nv loop. So, conventional wisdom says, make
the capacitor in the PNC circuit 10 times as big as the ones in the Nv
loop. In practice, I've had no trouble using a cap only 5 times as big
(on a 6-Nv loop).
Anyway, thought I'd better confirm this as well.
Bruce
10785 Wed, 23 Feb 2000 22:50:40 -0800 [alt-beam] Re: ... one more thing ... beam@sgiblab.sgi.com Bruce Robinson Sorry, not meant for the list. Apologies all.
(Darn I hate it when that happens. $%$#%^)
Bruce
10786 Thu, 24 Feb 2000 17:36:33 +1100 Re: Aquabots
> In a message dated 2/23/00 4:02:19 AM Eastern Standard Time,
> HENDERSONGANG@bigpond.com writes:
>
> > I was just wondering if using a drive shaft type thing on an Aquabot
would
> > work as i can never seem to get Jims tutorial right and water seeps in.
> Also
> > I don't have any spare walkman motors around (anymore) so I was
wondering
> > are there any substitutes?
> Is there something I can do to improve the tutorial? Could be I'm not
> explaining it well enough. I've never had a failure due to water
> infiltration. Walkman motors seem to work the best. I'm not sure of a
> suitable replacement. There is a Walkman style jobbie that Walmart sells
for
> 5.00 bucks. I buy up a bunch and cannibalize them.
>
> See ya,
> Jim
> http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
> ICQ# 55657870
Home