Re: Microwaving money
- From: default
- Date: Mon, 20 Mar 2006 14:38:32 -0500
On Mon, 20 Mar 2006 18:35:59 GMT, James Sweet <jamessweet@xxxxxxxxxxx>
wrote:
Read on the web that some folks were taking the anti-lifting tags used
by Walmart and re-magnetizing them and attaching them to the plastic
parts of the carts inside the store - supposed to set off the alarm
when the shopper wheels the cart out. Haven't tried it yet.
I don't shop at Walmart so I'm not sure what sort of tags they use but I
was under the impression that security tags are a resonant antenna of
sorts which are deactivated by a strong RF source burning out a link in
them.
No, not the ones I'm seeing. White plastic case about an inch long
less than 0.1" thick and 1/4" wide. Inside are three pieces of metal.
They look sort of like mu metal or a nickel steel alloy. They have
different permeability (or one was different from the other two - been
awhile).
The manufacturer must be adding them because they are under the
blister packs if not on the item itself.
No antenna like a standard rfid, no electronics at all.
acousto-magnetic system
an explanation on how it works
http://www.retailtheftprevention.com/presentation/refdocs/Howstuffworks_EAS.htm
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- Re: Microwaving money
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