Newsgroups: comp.robotics
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From: kdc5072@ultb.isc.rit.edu (K.D. Colagio)
Subject: Re: Preassure sensor (build my own) ???
Message-ID: <1994Apr18.185212.3495@ultb.isc.rit.edu>
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Organization: Rochester Institute of Technology
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Date: Mon, 18 Apr 1994 18:52:12 GMT
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(Anders Nyg}rd) writes:
-> 
-> I have heard that one could build ones own preassure sensor
-> using a semi-conducting bag. Is this true and if so how do I do?
-> 

The way that I amke them when I want to play around with them is
with the black "foam" that chips come in (the anti-static stuff).

Here's how:
	-----------            <- top of foam
	| _______ |            <- edge, metal plate or wire, edge
	|         |            <- edges
	| _______ |            <- edge, metal plate or wire, edge
	|         |            <- edges
	-----------            <- bottom of foam

If you attach wires to the metal plate, and connect that to an ohm
meter, when you press on the foam (from the top and bottom) the
resistance will change...run that into an Analog to Digital
converter and you are all set.

Hope that helps...

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     Kevin Colagio aka KDC5072@ultb.isc.rit.edu   KiLar on IRC
 Finger kdc5072@ultb.isc.rit.edu for public pgp key and misc stuff.
       One man's perversion is another man's persuasion --me
     Make it "Equal Rights" and I'll agree.    Silence ~= Death
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