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From: tolboel@iesd.auc.dk (Morten Tolboel)
Newsgroups: sci.electronics
Subject: remote control buttons
Message-ID: <TOLBOEL.90Jul10101202@dirac.iesd.auc.dk>
Date: 10 Jul 90 09:12:02 GMT
Sender: news@iesd.auc.dk (UseNet News)
Distribution: sci
Organization: Mathematics and Computer Science, University of Aalborg
Lines: 16


Many IR remote controls have rubber buttons which have some kind
of conducting material on the backside of them. When a button is
pressed this conducting material is pressed onto the pcb to make
a contact.

Does anybody know what this conducting material is ? (some kind
of carbon or what?) Many of the buttons on my SONY remote control
does not work very well anymore and I have been told that this
is a common problem (at least for SONY IRs). I could get replacement
buttons for my remotecontrol (~ $30) but I would like to know if
somebody has any experience how to replace the old conducting
layer on the backside of the buttons. 

Morten Tolboel
e-mail tolboel@iesd.auc.dk