Perhaps a little larger than what you had in mind but this may be useful:
http://shop.marcboon.com/

-Joel


"The path to hell is paved with good intentions."


On Wed, Aug 19, 2009 at 10:09 AM, John Navarro <[email protected]> wrote:

>
> http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/rfid/List/0/SortField/4/ProductID/517/Default.aspx
> <http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/rfid/List/0/SortField/4/ProductID/517/Default.aspx>small
> enough?
>
> On Tue, Aug 18, 2009 at 2:56 PM, James Costello <[email protected]>wrote:
>
>> Does anyone know of a device that could be used to alert when there are
>> RFID sensor around?  Something small, about the size of key fob.
>> Something that might be good to have at say a computer security
>> conference.
>>
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