Alt-BEAM Archive
Message #13702
To: beam@sgiblab.sgi.com
From: "Ian" Synet@Psynet.net
Date: Thu, 20 Apr 2000 12:50:54 +1000
Subject: Re: BiCore Occilator (Another idea)
> Hi, I tried the thing with the speaker once. Kinda neat. Anyway I thought
of
> another use for a bicore the other day. I'm helping work on a couple
walkers
> as part of a graduate project and we need four IR proximity sensors.
Anyway
> I found some designs on the net for 40K emitters but all were fairly
> complex. After building a few of them, none of which gave us very good
> results, an idea popped into my head. What don't we just use a bicore! We
> built the standard bicore with .11uF caps (two .22's is series) and a 5k
pot
> in parallel with a 1.8K resister. With the help of an oscilloscope (not
> really needed) we got it tuned up and now we get excellent results. The
> sensor can detect objects about 1 foot away and even more if we decreased
> the 1K resister in series with the IR emitter. BTW: We're using U60 (?) IR
> detectors right now but may switch to the modules sold by Jameco. They
seem
> to be more resistant to ambient light.
>
> Just thought some of you might be interested in this.
>
> Laterz
>
> --------
> There is only one true "SyNeT"
> BEAM Online - http://www.beam-online.com
>
> "Best remote NT administration tool -- a car"
>
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13703 Thu, 20 Apr 2000 12:58:06 +1000 Good source for solar panels, even flexible ones :) "Gabriel DeVault"
> http://www.plastecs.com/solar.htm
> They have a pretty descent collection and some fairly good flexible panels
for cheap. Might be perfect for that sphere-bot or
> something :)
>
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13704 Wed, 19 Apr 2000 23:26:25 EDT Re: Good source for solar panels, even flexible ones :) beam@sgiblab.sgi.com turtletek@aol.com In a message dated 4/19/00 7:19:22 PM Central Daylight Time, gabe@mediax.com
writes:
> http://www.plastecs.com/solar.htm
> They have a pretty descent collection and some fairly good flexible panels
> for cheap. Might be perfect for that sphere-bot or
> something :)
Try Jameco (jameco.com) too. They have great 3 volt flexibles. Search for
flexible solar cells on their site and they'll turn up.
-Brien the TurtleTek
www.extremesc.com/turtletek/beam
13705 Wed, 19 Apr 2000 23:31:01 -0400 (EDT) Re: BiCore Occilator (Another idea) Camo beam@sgiblab.sgi.com Dennison I Bertram Personally I had an idea a long time ago that I told Tilden about. If you
set up a bicore which is biased by a CDS cell of some sort, and had this
CDS cell or other light dependent resitor element covered witha filter of
some sort so only certian colors of light passed through like red, blue,
and green, then you could have bicores that could osscilate dependent on
the presence and intensity of certian colors of light. Then you could
connect these bicore up to colored leds or light bulbs with colored
filters, and you could reproduce, roughly the same color cast on the
bicores. much like a television produces images and colors. It could be
built into a really small space and used for 'camo' or something like
that. Anyway, yet another one of my nutty ideas.
dennison
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