Article View: sci.electronics
Article #1272Re: Metal detecting revisited - hobby that pays for itself
From: Suomalainen Harri Olavi
Date: Tue, 22 Aug 1989 08:59
Date: Tue, 22 Aug 1989 08:59
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The idea of metal detector is that when you place the coil near metal the inductance of the coil gets higher in value. If the coil is used eg. in an oscillator tank the frequency will be changed. If the coil is part of an audio oscillator you'll notice the change in frequency. You could as well detect the inductance of the coil directly and be noticed of metal as the inductance is changed. --- E-mail: c37189h@saha.hut.fi * If you're feeling good, don't * UUCP: ...!mcvax!santra!saha!c37189h * worry - You'll get over it! *
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arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wasatch!cs.utexas.edu!uunet!mcvax!sunic!kth!draken!tut!santra!saha.hut.fi!c37189hShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wasatch!cs.utexas.edu!uunet!mcvax!sunic!kth!draken!tut!santra!saha.hut.fi!c37189h From: c37189h@saha.hut.fi (Suomalainen Harri Olavi) Newsgroups: sci.electronics Subject: Re: Metal detecting revisited - hobby that pays for itself Message-ID: <24539@santra.UUCP> Date: 22 Aug 89 08:59:57 GMT Sender: news@santra.UUCP Reply-To: c37189h@saha.hut.fi (Suomalainen Harri Olavi) Organization: Helsinki University of Technology, Finland Lines: 10