"amdx" schreef in bericht news:okvr5u$dk3$ snipped-for-privacy@dont-email.me...
I can't feed my cat without finding stray cats coming around eating what she didn't. I have started emptying her bowl if she stops eating, but that is not the solution. Is there a passive device that I could put on a collar to trigger a receiver that I could attach to a yet to be designed cover for the cat bowl, so the food is only available when the cat is at the bowl. I'd prefer a passive device on the collar, don't want to mess with batteries. I wonder about the anti theft devices they put in product packages.
Mikek
Cat doors using RFID-tags for autorising are quite common these days. They're smal teardrops like tags on the collar. It's used for humans as well, in tickets for example. (That tags are cards, no drops.) In Rotterdam a nightclub owner experimented with some regular customers to ware a chip in their arms just underneath the skin. The range for the tags depends highly on the frequeny and the dimensions. Large ones on boxes and crates can be read over more then one meter.
petrus bitbyter