Joe Farr scribbled:


> There is probably only one item in the store that dosn't have a produce
code :>

My luck that I just happened to pick that one.


> I think the PIC embeded in the food is probaly not the answer since that
would be
> too expensive.

True -- for the items with longer expiry dates, there would need to be some
form of low-power battery controller chip.  They would also need to use SOP
or smaller technology to fit into grapes.  BTW, I don't remember seeing any
holes for the ICSP updates.


> More likely they inject the produce with radio-active substaces
> with different decay rates - that's bound to be cheaper. <grin>

I'll tell you tomorrow when I try one ... or maybe I won't tell you :-)


> What would have happened if you'd 'forgot' to tell the system about the
> mangoes or not scanned one of your tins of food I wonder ?

This is where the thought of the cameras came up.  There's gotta be some
form of
security here.   Or then again, this could explain what happened to
Kmart..??? :-)
The system seemed to detect the bag removal, so perhaps there is a scale
there
that detects changes (increases) in weight w/o anything being scanned, or
perhaps
there is a database of the weights of all items that it checks in the bag
for
verification.

Cheers,
-Neil.

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