The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: Terry King
Subject: Re: Water sensor
Date: Fri, 17 Jan 2003 10:58:41 -0500
Organization: Mountain ClockWorks
References: <firstname.lastname@example.org> <email@example.com>
X-Newsreader: MicroPlanet Gravity v2.30.1784
> *That* is a neat solution/approach to inexpensive probe construction. I wonder
> how a silver-mica cap would work vis-a-vis long-term stability.
Hmm.. Silver-mica's have pretty thin mica, up to 400V or so. The
challenge would be in cutting the capacitor to expose a side where the
stacked silver/mica layers are. Difficult to get a clean cut without
'smearing' the metal and shorting it out. Maybe the edge could be
cleaned up with fine sandpaper?
I wonder if this would detect 'mist' landing on the 'sensor'?
There are multi-layer ceramic capacitors for larger values. Maybe
'fracuring' one of those would create a more-sensitive 'sensor'.
In any case, the sensor is well bypassed!
Regards, Terry King ...In The Woods In Vermont
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup