Alt-BEAM Archive

Message #13367



To: beam@sgiblab.sgi.com
From: Aaron Letts beam@sgiblab.sgi.com
Date: Tue, 11 Apr 2000 19:09:13 -0400 (EDT)
Subject: RE: motor problems (nobody knows???)


I am using the Flashing LED cuircuit that you can
download the PDF for from Solarbotics.



--- Wilf Rigter wrote:
> There are some good SE tutorials but most describe a
> specific SE and not the
> general principles of Solar Engine design and how to
> optimize for different
> applications. This question has come up many times
> on the list before, so a
> search of the BEAM list archives should yield
> valuable clues. Otherwise why
> don't you tell us which SE you are using then go
> through a mini SE circuit
> analysis on-line and tap into some expert opinions.
> Warning though, such
> discussion can get quite detailed.
>
> regards
>
> wilf
>
>
> > -----Original Message-----
> > From: Aaron Letts [SMTP:beamlist@yahoo.ca]
> > Sent: Monday, April 10, 2000 7:46 PM
> > To: beam@sgiblab.sgi.com
> > Subject: RE: motor problems (nobody knows???)
> >
> >
> > > Otherwise you will have to tweak the SE
> components
> > > to match the motor specs and learn a lot about
> SEs
> > > in the process.
> >
> > Wilf:
> >
> > Where can I go to find info that would help me on
> > this?
> > Thanks again,
> >
> >
> > Aaron
> >
> >
>

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13368 Tue, 11 Apr 2000 16:38:05 -0700 Re: Magbot butterfly beam@sgiblab.sgi.com Bruce Robinson leif_ 74 wrote:
>
> i'm wondering how you make the wings on a butterfly flap.

There's a few examples on the BEAM Web Index under the "Sitter" page.

http://www3.telus.net/rfws/bwi/index.html

Bruce



13369 Tue, 11 Apr 2000 22:40:31 -0400 (EDT) Re: motor problems beam@sgiblab.sgi.com beam@sgiblab.sgi.com this sounds like a problem I had a while ago. The capacitor had too high internal resistance. Try replacing the cap with a different if you have one. If not then sometimes you can put a smaller cap in parallel with the original, but replacing it is better.

Chris

---- you wrote:
> I just got 2 VCRs from the dump and I tore them apart.
> I got 3 motors from each. So, I made a simple
> solarengine to put on one of the ones that I thought
> was good, just to give it a try. After I was done when
> I was testing it, I ran into some problems. I would
> put it under the lamp, then it would go like it was
> suppose to, but it wouldn't trigger again, and it
> would make a high pitched sound. After I took it out
> of the light, then put it back in agian, it would go,
> but only once. It would never go twice, I had to take
> it out of the light, then put it back in. Why does it
> do this, and what can I do to fix it?... if there is
> anything at all.
>
> Thanks,
>
>
>
> Aaron
>
> _______________________________________________________
> Do You Yahoo!?
> Get your free @yahoo.ca address at http://mail.yahoo.ca
>


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13370 Wed, 12 Apr 2000 09:10:42 +0100 Photodiode use in BEAM circuits "'BEAM list'" "Dr. Duncan Lawrence"
Can someone explain, or point me towards an explanation of, why in
photovore circuits the photodiodes are connected anode-anode (via
centralising pot)? But in BEAMAnt circuits, the photodiodes are connected
cathode-cathode.

I am assuming it has something to do with the resistance properties under
normal and reverse bias, but exactly what that is I don't know.

Secondly, can the photodiodes be swapped for Light Dependant Resistors in
either application?

Still a bit to learn yet!

Many thanks

Duncan


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