Alt-BEAM Archive
Message #08968
To: beam@sgiblab.sgi.com
From: Jonathan D Rogers chessmaster14@juno.com
Date: Sun, 9 Jan 2000 22:44:36 -0500
Subject: [alt-beam] Photovore parts
Hey, I'm about to build my first photovore, and I wanted to compliment
Chiu-Yuan Fang on his excellent BEAM site, especially the section on
building a free-form photovore.
I assume he's on this mailing list...
Anyway, it's been very helpful and I love the free-form design. Very
cool.
Does anyone have any suggestions on how to mount those cool touch sensor
feeler things that Solarbotics sells to the design? I mean, it looks like
you could glue them to the cap...but they're not in the circuit...
Jonathan
8969 Mon, 10 Jan 2000 15:05:28 +1100 [alt-beam] Re: Alf & Dragonfly beam@sgiblab.sgi.com "Ben Hitchcock"
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Hi,
>From: Elmo
>Date: Mon, 10 Jan 2000 13:08
> Can someone fill me in on some more technical details of the coils you
> guys have used in these projects.
>
> What kind are they?
> Where did you get them? (Ben..Does Dick Smtih sell them?)
> Are you using magnets with the coils or something else?
I got mine from the insides of a solar-powered light meter that I picked up
from Dick Smith. I just had a look at the catalog, and it appears that the
item isn't for sale anymore.
But you can get the same thing minus the solar panel for about the same
price - Dick Smith part # Q 2100 - Level Meter - $12.65.
Page 189 of the 1999 - 2000 catalog.
It's just your normal meter thingy that you find on audio panels, voltage
sensors, analog multimeters, etc. You can probably find a couple in your
local Cash Converters, living inside a light meter or old cassette recorder
etc.
The way it works is that you have a fixed permanent magnet, and a moving
coil. The coil is attached to the fixed part via springs, which also allow
current to pass through them.
A word of warning - DON'T attempt to pull the coil assembly apart. The
springs are very easily damaged. I went through two of them before my
dragonfly was working properly.
>
> ....A photo of the coils would be nice :)
See the attached jpeg. Unfortunately I don't have my dragonfly with me,
otherwise I'd take another photo of the coil for you. This is from the Dick
Smith site.
Ben
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8970 Sun, 9 Jan 2000 23:09:01 -0500 request
> i am an amateur and i would love to be on the BEAM mailing list.
>
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