Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!apple!bionet!ames!xanth!nic.MR.NET!umn-cs!dayton!jad
From: jad@dayton.UUCP (J. Deters)
Newsgroups: sci.electronics
Subject: Re: How to convert weight to volts?
Keywords: cheap
Message-ID: <6648@dayton.UUCP>
Date: 13 Jul 89 16:33:57 GMT
References: <7903@etana.tut.fi> <10040010@hprmokg.HP.COM>
Reply-To: jad@dayton.UUCP (J. Deters)
Organization: Terrapin Transit Authority
Lines: 18


A 'el cheapo' method I saw in a Radio-Electronics column once was:
Use the conductive foam that your ICs come packaged in as the main
ingredient in a copper sandwich.  A picture will help:

	--------  <-copper disk (penny, PC board, whatever)
    ~~~~~~~~
    ~~~~~~~~  <-conductive foam
    ~~~~~~~~
    --------  <-copper disk

Your wires are connected to the copper disk.  When compressed, the
resistance of the conductive foam is reduced.  You could easily
experiment to find values.

-j
-- 
"Captain's log:  Stardate 2734.3.  'I am nailed to the hull.'"