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Is there a way to have an electronic key on my cats collar so everytime she goes in my room a buzzer goes off ??

I was wondering if you could make an electronic key or something like that so when she crosses or enters the area a buzzer or alarm goes off so she runs away.

Re-design7 years ago
Metal collar on the cat and metal detector circuit under a mat on the floor. It would be an easy circuit to build and the sensing coil could be a big oval so that it covered the door.
jules15 (author)  Re-design7 years ago
sweet thanks im going to try that
Grathio7 years ago
Another (cheaper) option than RFID is to rig a pair of IR detectors across the doorway, one about 6 inches up, one 3 feet up. Hook them both to a microcontoller like the Arduino. When both are triggered at the same time (by a human) don't sound the alarm, when only the bottom one is triggered sound the alarm. Of course if you have more than one pet this won't work.
gmxx7 years ago
yes... look into rfid with the arduino

http://www.radioshack.com/product/index.jsp?productId=2906723 is an easy to use rfid reader.