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Article #11075Re: HELP: non-intrusive current sensor
From: marxhausen paul
Date: Fri, 06 Nov 1992 13:41
Date: Fri, 06 Nov 1992 13:41
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mbattist@magnus.acs.ohio-state.edu (Mark A Battisti) writes: >I need a current sensor (On/OFF) for a standard 110 AC line which >gives a logic signal (5V). I tried running the live line through a coil >which I ripped out of a small transformer and then amplify the coil >response w/op amps but I could not get this to work. Get yourself a toroid core - it's just a little donut of ferromagnetic material - and have your "hot" line make a few loops through it. Run a second wire through it a bunch of times and you've got a toroidal transformer that ought to put out a signal proportional to the current on the 110 AC line. -- paul marxhausen .... ....... ............. ............ ............ .......... .. . . . . . university of nebraska - lincoln . . . .. . . .. . . . . . . . . . . . . . . . . . . . . . grace . . . . . . . . . . . . happens .
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Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!moe.ksu.ksu.edu!crcnis1.unl.edu!unlinfo!mpaul From: mpaul@unlinfo.unl.edu (marxhausen paul) Newsgroups: sci.electronics Subject: Re: HELP: non-intrusive current sensor Date: 6 Nov 1992 13:41:50 GMT Organization: University of Nebraska--Lincoln Lines: 18 Distribution: usa Message-ID: <1ddsmuINNdhd@crcnis1.unl.edu> References: <1992Nov5.214614.14507@magnus.acs.ohio-state.edu> NNTP-Posting-Host: unlinfo.unl.edu