Article View: sci.electronics
Article #10978Re: Soil Humidity Sensors
From: Dave Medin
Date: Thu, 01 Oct 1992 15:06
Date: Thu, 01 Oct 1992 15:06
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For soil moisture detection with a set trip point, try using a National
LM1830 (from Digi-Key, 1-800-344-4539). The chip uses an AC excitation
signal so it won't cause electrolytic corrosion of your sensors, and works
by detecting the level of its excitation signal. It is simple to apply
(the National Linear data book has some ap notes).
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Dave Medin Phone: (205) 730-3169 (w)
Intergraph Corp. (205) 837-1174 (h)
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!infonode!ingr!b30news!catbyte!medin From: medin@catbyte.b30.ingr.com (Dave Medin) Subject: Re: Soil Humidity Sensors Message-ID: <1992Oct1.150603.15735@b30.ingr.com> Sender: medin@catbyte (Dave Medin) Reply-To: medin@catbyte.b30.ingr.com Organization: Intergraph Corporation, Huntsville AL References: <6079@mtecv2.mty.itesm.mx> Date: Thu, 1 Oct 1992 15:06:03 GMT Lines: 17