From: John Woodgate
Subject: Re: VERY short range Proximity Sensor
Date: Sun, 12 Jan 2003 22:16:19 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Sun, 12 Jan 2003 22:59:11 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Gerry Schneider
wrote (in <3E21D785.D5767122@sympatico.ca>) about
'VERY short range Proximity Sensor', on Sun, 12 Jan 2003:
>Not totally true. One of the QProx capacitive sensor chips (12C508 base) is
>designed specifically for automated water faucet control, and the technology is
>basis of at least one patent (US 5,730,165). They also claim longer battery life
>than pulsed IR.
There's always one! It must be very difficult to cope with condensing
conditions, unless the sensor is hermetically sealed, which doesn't do a
lot for the sensitivity. It sounds to me like a 'heroic' solution -
wonderful, but too much effort.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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