Welcome to the cat future, all doors will scan your cat's microchip (RFID) and if it's your cat it can come inside...
Keeps out unwanted cats by using your cat's existing microchip number without the need for a collar. Automatically detects light levels and can keep your cat in at night. Designed by a vet.
Related:RFID for Makers. Build this kit to read radio frequency ID tags. Subscribers--read this article now in your digital edition!
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...its already been patented by Matsushita, about 5 years ago (when the idea occurred to me and I trawled through the patents!)
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I'd hold off chipping the cat until they figure out the whole causing cancer thing. http://www.washingtonpost.com/wp-dyn/content/article/2007/09/08/AR2007090800997_pf.html
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This looks like the same thing mounted on a pet carrier:
http://www.nekofeeder.com/
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