BBC Moneybox - contactless hiccups
lists at internetpolicyagency.com
Mon May 20 16:01:48 BST 2013
In article <20130520144013.GB48009 at davros.org>, Clive D.W. Feather
<clive at davros.org> writes
>> There are several collision avoidance mechanisms for RFID cards.
>Cambridgeshire Libraries has an automated checkout system that uses some
>kind of RFID tags in the book. I've tried putting a stack of 6 books on the
>reader and it found all of them.
I'd expect collision detection to work well for RFID chips of the kind
used in products, but the ones in transaction cards do seem to interfere
with each other. They also have a very short time to complete the
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