Cat flap, was RE: RFID Human Implants - Occupancy Detection

["Pete Shew" <ukha_d@xxxxxxxxxxxxxxxxxx>]

I think I've solved the cat flap (I'll pass on the RFID reader on eBay for
now).

Staywell, in their wisdom, put the coil as far away from the outside as
possible, and with quite a thick door that was just too much. I relocated
the coil to the outside bezel and ran a cable throught the door to the PCB.
Now it doesn't click and annoy her when she's just looking out, and she
came in with no problem just now.

All this messing with her door has got her very confused though, but she'll
settle down when it's reliable, I hope.

Pete

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

On 09/02/2005 at 08:56 Ward, David wrote:

>I have it in front of me
>
>The RFID disc is inside the keyfob (easily pried apart, just clips back
>together)
>
>The disc is 30mm Diameter and 0.7mm thick,  the embedded coil antenna
is
>25mm od 19mm id
>
>picture here www.dave.ward.freeuk.com/rfidtag.jpg
>
>Dave
>
>
>-----Original Message-----
>From: Ward, David [mailto:DAvid.Ward@xxxxxxx]
>Sent: 08 February 2005 11:27
>To: 'ukha_d@xxxxxxx'
>Subject: RE: [ukha_d] RE: RFID Human Implants - Occupancy Detection
>
>
>
>Pete
>
>IIRC It's quite large in diameter around 25 to 30mm I think,
>but only 1mm or
>so thick
>
>I'll try and remember to check tonight
>
>
>Dave
>
>-----Original Message-----
>From: Pete Shew [mailto:ukha_d@xxxxxxx]
>Sent: 08 February 2005 10:54
>To: UKHA
>Subject: [ukha_d] RE: RFID Human Implants - Occupancy Detection
>
>
>
>David,
>	can you remember what size the thin PCB disc is inside
>the keyfob? I presume it is mostly a coiled aerial. I am hoping
>to get a tag small enough to be carried by our cat because a)
>the Staywell cat flap key is large and awkward shaped, and b)
>it doesn't have a very good detection range, especially from
>outside. Mounting an RFID reader aerial just below the door on
>the outside would seem to give a closer range.
>
>Pete
>
>-- Original Message --
>    * From: "Ward, David" <DAvid.Ward@xxxxxxxxxx>
>    * Date: Thu, 27 Jan 2005 10:18:31 -0000
>
>Yup,  those are the ones I have
>
>his site is http://home.btconnect.com/QTEKNOLOGY/
for more info
>
>If I remeber correctly the keyfobs come apart easily and inside
>is a very
>thin PCB disc with the RFID IC embedded in it.
>
>FWIW I The reader sputs out serial data in the of the Animal ID
>tags in our
>cats,  now I just need to get Cat, Reader, DSO or PC together
>in the same
>place to work out the code
>hmmmm I wonder If pronto could store the code If I modulated the
>bitstream?.....
>
>I think this is going to turn out to be one of those projects
>that requires
>a whole box of 'Scooby Snacks' :-S
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>