Re[4]: RE: RFID Human Implants - Occupancy Detection

["Pete Shew" <ukha_d@xxxxxxxxxxxxxxxxxx>]

Mm, I'm not convinced. The PIC is fine and would probably outlast the
battery shelf life, but getting an IR LED with a wide beam angle, and the
mechanics of trying to avoid being obscured by fur, might defeat me.

Has anyone done work on retinal scans of cats? :-)

Pete

*********** REPLY SEPARATOR  ***********

On 08/02/2005 at 13:56 Ward, David wrote:

>I have seen commercial electronic Cat flaps that use a fob that has an
IR
>emmitter in it
>If you were crafty with a PIC10F microcontroller you could make one
>
>Dave
>
>-----Original Message-----
>From: Pete Shew [mailto:ukha_d@xxxxxxx]
>Sent: 08 February 2005 13:38
>To: UKHA
>Subject: Re[2]: [ukha_d] RE: RFID Human Implants - Occupancy Detection
>
>
>
>Our cat is chipped, but my understanding is that the antenna on
>the chip is so small that the reader has to be essentially in
>contact with the animal. That's why I'm looking at an
>alternative to hang on her collar to operate the cat flap.
>
>One thing that concerns me is that an external RFID would
>possibly mask the internal one if she got lost, but I suppose
>if she still had her collar on, then her email address and
>phone number would still be with her.
>
>We didn't have to bother with this nonsense until we found a
>recent new neighbours cat coming down our stairs!!  :-(
>
>Pete
>
>*********** REPLY SEPARATOR  ***********
>
>On 08/02/2005 at 12:58 Mark Kaye wrote:
>
>>Ward, David wrote:
>>> Well,  these ones I bought from QTEKNOLOGY certainly detect*
the
>>presence of
>>> the 'PetLog IdentiChip'  in our animals
>>>
>>>  <http://home.btconnect.com/QTEKNOLOGY/>
 (Check ebay as he
>sometimes has
>>> stuff on aution)
>>>
>>> When I say detect*, I mean that as a quick bodge I bunged an
>LED on the
>>> data-out line of the RFID reader IC,  when I run the aerial
over the
>>chip in
>>> our Cat or the fobs it was supplied with the LED lights.....
>>>
>>> I have yet to determine if hte code it's spurting out is
>valid or just
>>> garbage that's not repeatable
>>> Also the read range of the small antenna supplied with the
>board is about
>>> 10mm (measured from the OUTSIDE of the aminal ;-)
>>
>>How cool,  I'd be very interested if, somehow the detection
>range could
>>be extended.  How practical would it be for a catflap if the
>cat has to
>>get its chip within 10mm or so of the reader?
>>
>>
>>
>>
>>
>>Yahoo! Groups Links
>>
>>
>>
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