Yeah, how do they get pricing from the tin-foil and pie plates?

  ----- Original Message -----
  From: "Zik Saleeba"
  To: "Microcontroller discussion list - Public."
  Subject: Re: [OT] I wonder what company would let such a product
  outthedoor. Naw, it couldn't be ...
  Date: Mon, 11 Dec 2006 14:59:45 +1100


  On 12/10/06, Denny Esterline wrote:
  > I've heard the rhetoric on this idea, but I can't imagine it
  > actualy ever being implemented.
  > Think about how hard it would be to steal something - damage the
  > RFID tag, throw it in the
  > cart, walk out. WAY to easy.

  We have some guys doing RFID at my current contract location. They
  tell me that the "rolling a trolley full of groceries through a
  checkout" example is not realistic. It can be done for a demo but
  it's
  much much harder to get working in real life.

  The big problem is that RFID reception is marginal at the best of
  times so a cart full of random items - some of which may be
  conductive
  - is very hard to guarantee for a 100% read rate. And retailers don't
  like having items not paid for. A few tin cans piled over other items
  in a cart make a passable Faraday cage.

  Cheers,
  Zik

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