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Article #15755

Re: XMAS Lights Theft Alarm

#15755
From: Todd Inch
Date: Thu, 17 Dec 1992 21:12
17 lines
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In article <1992Dec10.182447.16893@vpnet.chi.il.us> cgordon@vpnet.chi.il.us (gordon hlavenka) writes:
>>>... The device would work by detecting the AC current being
>>>consumed by the lights, then triggering an alarm if it drops below a certain
>>>point.
> toddi@mav.com (Todd Inch) writes:
>>This will be very nearly impossible with parallel-wired (C-7 or C-9) bulbs, and
>>still difficult with series-wired mini lights.  Here's why:
>
>But you don't need to look at a steady-state current, just a sudden
>change.  This should be pretty simple to spot.

Hmm, didn't think of that.  But what if the bulb is disconnected when the
AC is at/near 0 Volts?  I suppose that if the bulb is mechanically disconnected,
the disconnection would generate some noise that might last long enough for
the voltage/current to rise again (e.g. essentially switch bounce)?

And of course, twinkle-lights just wouldn't do :-).
Technical Details
Message-ID: <1992Dec17.211226.9348@mav.com>
Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!usenet.coe.montana.edu!news.u.washington.edu!uw-beaver!fluke!gtisqr!toddi
References: <ByoqLt.DLJ@waterloo.hp.com> <1992Dec08.215021.18099@mav.com> <1992Dec10.182447.16893@vpnet.chi.il.us>

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From: toddi@mav.com (Todd Inch)
Subject: Re: XMAS Lights Theft Alarm
Message-ID: <1992Dec17.211226.9348@mav.com>
Organization: Maverick International Inc.
References: <ByoqLt.DLJ@waterloo.hp.com> <1992Dec08.215021.18099@mav.com> <1992Dec10.182447.16893@vpnet.chi.il.us>
Date: Thu, 17 Dec 92 21:12:26 GMT
Lines: 18