Article View: sci.electronics
Article #7732Stock control tags
From: Simon Kravis
Date: Fri, 12 Oct 1990 04:48
Date: Fri, 12 Oct 1990 04:48
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694 bytes
Does anyone know how the detection system for the metallic tags attached to CDs and other small and valuable items in shops works? It looks as though it's some kind of magnetic detection system, judging by the large sensing coils near the door and the fact the the tags are deactivated by running what looks like a magnetic roller over them.
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<1990Oct12.044801.8842@csis.dit.csiro.au>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!munnari.oz.au!csc.anu.oz.au!csis!skravisShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!munnari.oz.au!csc.anu.oz.au!csis!skravis From: skravis@csis.dit.csiro.au (Simon Kravis) Newsgroups: sci.electronics Subject: Stock control tags Message-ID: <1990Oct12.044801.8842@csis.dit.csiro.au> Date: 12 Oct 90 04:48:01 GMT Organization: csis.dit.csiro.au Lines: 5