Alt-BEAM Archive

Message #13180



To: alt-beam@egroups.com
From: "Joe Tochka" eyor@beld.net
Date: Sat, 8 Apr 2000 10:23:19 -0400
Subject: Re: [alt-beam] solar cells


You are building a 10 inch tall photovore?

>I have a WICKED idea
Are you from MA?



13181 Sat, 8 Apr 2000 15:48:15 +0100 (BST) Solar Cells and Motors beam@sgiblab.sgi.com =?iso-8859-1?q?John=20Lane?= Is there any decent shops in the UK for buying solar
cells and small motors?

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13182 Sat, 8 Apr 2000 08:38:07 -0400 'Nother photovore question "Berkowitz"
Yeah, I know the list has been getting allot of questions on basic 'bots =
recently, but I've got one too : ).

I am having problems with the basic photopopper type. I've breadboarded =
the entire circuit, but can only get one of the motors to pop. I know =
the other one works because I've switched the two. I've checked the =
circuit connections many times and still haven't found something. Is =
there some test I can do to help track down the problem, maybe one that =
doesn't need a Multi meter?


-Thanks
Zac




http-equiv=3DContent-Type>
> too sure how to implement it using BEAM circuits though ~ but ~ I have a
> small BOT I made for a grade in microprocessor applications.
>
> The Sharp GP2D05 infrared sensor module,
>
> http://www.acroname.com/robotics/parts/R21-IR05.html
>
> is a great package for sending out an infrared signal and receiving it all
in
> one tidy package without no messy adjustment or supplying the proper
freq.,
> etc. ~ it is adjustable for range from 10 cm to 80 cm. ~ it si also a low
> voltage unit ~ 3 vdc
>
> it works basically like this:
>
> You apply a high pulse for 3 milliseconds to clear the electronics in the
> package ~ then change state to a low to start the detecting process for
> approx. 30 to 40 (i used 32) milliseconds for it to stabilize ~ at the end
of
> that time you read the output from the sensor module ~ if it is a "low
> output" an object was detected in its visible range ~ if "high output"
> nothing there ~ I used a basic stamp for control and timing ~ and two
units
> pointed approx. 25 deg out ~ the beam or detection area is basically a
cone
> shape or more like tear drop shape ~ I experimented a bit with it and came
up
> with the optimal angle from center so that the modules would overlap in
the
> middle giving me an indication that something was straight in the bots
path ~
> i.e. both modules gave a low ~ I then wrote my basic code to avoid an
object.
> ~ plane and simple ~ but it got me an "A" for my grade ~ thats all that
> really mattered to me. ~ LoL
>
> I also did the same with the handy board in assembly code.
>

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