Alt-BEAM Archive
Message #08075
To: alt-beam@egroups.com
From: TurtleTek@aol.com
Date: Tue, 30 Nov 1999 21:34:18 EST
Subject: [alt-beam] Re: ICQ Numbers Site?
michael.hirtle@ns.sympatico.ca writes:
> That was Kristopher Lidman's site(i hope that was spelled right), i don't
> think
> it is up any more because i tried a few days ago but couldn't get their. U
> may
> know this site as Robot central or BEAM central or something like that.
Thanks. Using that information I found it, it's still up, it just hasn't been
updated since March. It still has the ICQ list, but I remember it being
longer..hmm..oh well. Anyway, here's the URL in case any others of you have
lost it:
http://home.swipnet.se/kristoffer/Index.htm
-Brien the TurtleTek
ICQ #: 26129492
8076 Tue, 30 Nov 1999 18:41:05 PST [alt-beam] Re: Type 3 Solar Engine beam@sgiblab.sgi.com "Timothy Flytcher" >Sounds allot like a ni-cad peak detection circuit. However they generally
>measure a .01-.05 drop in voltage over period of time (very short).
>However
>I do not belive a capacitor will drop in voltage when it is fully charged,
>just charge until explosion? Anyone know, I'm not brave enough to find out
>
sound like a quad op-amp circuit called a delta peak detection unique to
nicads... and yes, a capacitor can and will explode without any step down in
voltage (Don't ask)...
Timothy...
______________________________________________________
8077 Tue, 30 Nov 1999 18:45:56 -0800 (PST) [alt-beam] Re: Type 3 Solar Engine beam@sgiblab.sgi.com Daniel Grace Those are some very interesting points about the SE3,
which I had never thought about. Maybe they won't be
as big of a problem as expected when I get my circuit
hooked up. (I didn't today, because my sister had her
baby today! Woo! It's sorta named after me. Her middle
name is Danielle.) As far as who wants to tackle the
problem, that's what started this chain, I think that
I have it solved, I just have to get the parts to test
it.
~Daniel
--- Richard Weait wrote:
> At 12:24 AM 11/30/99 -0700, you wrote:
> >At 04:26 PM 11/29/99 , Mike Kulesza wrote:
> >>So Type 1 is FLEDSE, and Type 2 is 1381SE i
> figure?
> >
> >No, the FLEDSE and 1381SE are both type-1, being
> voltage triggered, i.e.:
> >They trip at a preset voltage.
> >
> >Type 2 are timer based, where the SE is tripped at
> regular clocked
> >intervals, regardless of stored power
>
> The old "HBS" SolarEngine was a Type-2 circuit;
> as long as there
> was a bare minimum voltage to keep the circuit
> running, it would
> trigger each time period.
>
> [Who wants to tackle Type-3]
>
> There was a charging circuit for NiCds published
> about 15 years
> ago that might be a good start on a Type-3
> SolarEngine. As I
> recall it was in _Electronics Now_ and monitored the
> battery
> voltage until it stopped increasing. (a sign that it
> has reached
> maximum charge) It was testing on a sampling basis
> (like Sun Eaters)
> and could be adjusted for level, rate and
> sensitivity. The Solar
> Engine Type-3 (perhaps SE(3) as a short form?) would
> differ by
> having no rate control; max rate would be determined
> by the solar
> cell. It could trigger whenever the capacitor fails
> to charge at
> one measurable rate and the solar cell is collecting
> above a set
> level.
>
> Failing to compare cap charge rate with input
> charge available
> would cause a trigger for every passing cloud, . . .
> a 'worst
> case' might see a trigger for every half-cycle of a
> fluorescent
> light. What are the other 'gotchas' at low light
> levels?
>
> Cheers,
>
> Richard.
>
>
=====
ICQ # 39402143
I spilled Pina Colada on your e-mail. Please re-send.
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8078 Wed, 1 Dec 1999 00:32:48 -0800 [alt-beam] Re: cap-boom beam@sgiblab.sgi.com "Larry F. Allen-Tonar" Greg,
I had a roommate in college who liked to do that with a wall-outlet
(insulated, long-handled pliers used, of course). He got the most
bang for his buck with electrolytics (the kind with marked plus
and minus leads). Normal caps just break down the dielectric of they
have a low voltage rating and arc out (usually popping the circuit breaker).
Either is rather likely to cause a fire or other personal injury.
Not recommended.
>25V, 220uF cap into socket = cap-boom
>
>I might add, my dad came down to the basement to find out what had caused
>the explosion, blue smoke and electrical burning smell. He found me and was
>not amused. I had interrupted him watching the Grand Prix.
>
>Cheers,
>Greg
>http://www.engr.uvic.ca/~gpowell/
Respectfully,
--
Regards, Larry F. Allen-Tonar +1 760/746-6464 (voice)
Software/Firmware Designer
P.O. Box 463072
Escondido, CA 92046-3072
"Futuaris nisi irrisus ridebis.", Carlton in _The Road to Mars_ by Eric Idle
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