I was going to ask if based on this an auto-cat-feeder could be done,
but apparently a few people have already thought about it:

http://meowspace.biz/  the easy way

http://hackaday.com/2010/07/17/rfid-cat-feeder-helps-with-the-diet/  the
genius way



Rossano


Il giorno gio, 06/09/2012 alle 21.16 -0700, Bob Blick ha scritto:

> On Thu, Sep 6, 2012, at 05:50 PM, cdb wrote:
> > Nearly two foot interrogation distance, my animal activated catflap ide=
a=20
> > gets closer to fruition.
>=20
> I have one of these, it totally rocks:
>=20
> http://www.sureflap.com/
>=20
> Ten months of use and still on its first set of batteries.
>=20
> The cat loves to show it off when neighbor cats are around, in and out
> every 30 seconds. Then one of them gives it a try - access denied!
>=20
> Bob
>=20
> --=20
> http://www.fastmail.fm - Email service worth paying for. Try it for free
>=20


--=20
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