Alt-BEAM Archive
Message #05628
To: beam@sgiblab.sgi.com
From: Sean Rigter rigter@cafe.net
Date: Tue, 10 Aug 1999 09:21:57 -0700
Subject: [alt-beam] Re: Candle bots
Not necesarily,
A control loop can be designed to control a light source to provide a
stabilized
light level in any part of the room. If it is bright, the light source
is off.
If it is dark, the light source is adjusted to compensate for low
ambient
light. By measuring the "error signal " in the control loop (if not
full on or
off), the contribution of the light source can be subtracted and local
ambient light condition determined. If this measured ambient light is
below a
threshold the bot stays in place or else it starts photophobic roaming
motion
until it finds a suitable dark ambient spot.
wilf
Dan Larson wrote:
> But then once the robot got there it wouldn't be the darkest
> part of the room any more, the side that the robot just came
> from would be the new dark spot. The robot would just go
> back and forth, or worse yet, wander aimlessly because the
> location of the darkest spot is constantly moving. The
> result is a feedback loop between the robots behavior
> and its sensory input. Not necessarily a bad thing
> if your actual goal isn't to just light the darkest spot.
>
> On Mon, 9 Aug 1999 20:40:05 EDT, Ripter01@aol.com wrote:
>
> >I had an idea, I don't know if this has ever been tryed before or not but
> >what do you people think of a bot that was candle powered instead of solar
> >powered? It could search out the darkest parts in the room and bring light
> >:) I just thought i could get feed back on this idea
> >Tell me what ya think
> >-Ripter
> >
5629 Tue, 10 Aug 1999 17:19:42 +0200 [alt-beam] Re: Building my first photovore arno.jansen@superconsult.nl DAMN!!!!!! Called, Conrad Electronics, Display electronics, Panasonic
Netherlands, Haag Techno. NOBODY!!!! Is not sold here…. So a last desperate
call to our dutch readers:
UK/US: What is a good component to replace the 1381J (I am not (yet?) a
wizzard, so I can't figure it out myself)…..
NL: Wat is een goed vervangings component voor de 1381J, want die krengen
zijn hier niet te krijgen……..
Sorry, for the dutch sentence…Just wanna be sure everybody gets the message
;)
Greetz and I'll be back after the Eclipse…
Arno
-----Oorspronkelijk bericht-----
Van: owner-beam@sgiblab.sgi.com [mailto:owner-beam@sgiblab.sgi.com] namens
JVernonM@aol.com
Verzonden: dinsdag 10 augustus 1999 16:31
Aan: beam@sgiblab.sgi.com
Onderwerp: Re: Building my first photovore
In a message dated 8/10/99 8:38:26 AM Eastern Daylight Time,
jlk@innernet.net
writes:
> Don't see why they can't...some strange export law or something?
I don't know. They won't say. The only thing I can figure is there are
restrictions placed on the distributorships. I have had offers to have
people
in Europe order them and ship them to me, so it's not something to do with
government or customs. You guys over there have problems with finding 1381
triggers, but we have to pay a premium for our solar cells.
Jim
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