Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!hplabs!hpl-opus!hpcc05!hpldsla!tonya
From: tonya@hpldsla.sid.hp.com (Tony Arnerich)
Newsgroups: sci.electronics
Subject: Re: Anti-shoplifting devices
Message-ID: <1990021@hpldsla.sid.hp.com>
Date: 11 May 91 02:10:21 GMT
References: <1991May9.135021.22131@sparrms.ists.ca>
Organization: HP Scientific Instruments Division - Palo Alto, CA
Lines: 13

I dissected one of these gizmos that was on a CD box. 

It has two curved elements (antenna?), an hourglass detail that was
blistered at the junction (burned out fuse for disabling), two exposed
circles of circuit trace (connection to disabling wand?) and a VERY
tiny silicon chip. There were two wires going into the chip, so I figured
that it might be a diode. Under a microscope (this thing measured only
about 0.2mm on a side!), there did not appear to be any complex circuit
pattern.

The overall dimensions on the "antenna" are about 3/4" by 5".

tonya@sid.hp.com