Alt-BEAM Archive
Message #00367
To: Richard Piotter richfile@rconnect.com, beam beam@corp.sgi.com
From: Sharon swilliam@cadvision.com
Date: Fri, 12 Feb 1999 20:13:36 -0800
Subject: [alt-beam] Re: Turbot!
At 05:28 PM 2/12/99 -0600, Richard Piotter wrote:
>Oh yeah, and I also was wondering if there are any specific places that the
>photodiodes or photoresistors should go? Do they go where the motor's
point, or
>on the top and bottom faces, or some other way??? Just wondering. I know
David
>H. has some movies at solarbotics. Little recomendation? I'm also planning on
>tring it with a bicore rather than a modified photopopper. I'm planning on
using
>batteries. Maybe I'll add solar panels some day. Also, is there any
diferences
>in using photodiodes or photoresistors in Bicores, and if there is an
important
>diference, is there anything special about how it's done, or what type of
parts
>to use? I'd like to do this right the first time, cause I think the thing
is a
>little small, and I don't want to mess it up.
yes, for use in a bicore, (such as a bicore head) the photodiodes act like
a variable resistor, that only has that resistance ONE way, and the other
way is pretty much a closed circuit (normal diode operation) i think, I
could be wrong, after all Im only 15, what do I know?. I recently built a
head, and I couldn't find pd's, so I used phototransistors, and it
occilates back and forth, but does not track light. Cds cells and photo
transistors will work in a microcore though, since it has a ground.
hope this helps,
-Jeremy Williams
>--
>
>
>Richard Piotter
>richfile@rconnect.com
>
>The Richfiles Robotics & TI web page:
>http://members.xoom.com/richfiles
>
>
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