Why not something like THIS? You can get dogtag-type RFID tags for a few dollars.
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Re: Proximity sensor for dog door ?
Why not something like THIS? You can get dogtag-type RFID tags for a few dollars.
"I have noticed that even those who assert that everything is predestined and that
we can change nothing about it still look both ways before they cross the street"
-Stephen Hawking
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