If you like to keep track of what’s going on in your house why not track the in and out activity of your pets. This Tweeting RFID Cat Door does exactly that! Have a look at the Twitter results of Gus and Penny. The other beneficial side effect is that it keeps all of the neighbor cats out of the food you buy for your animals.
"Each cat has a small RFID tag on the collar. When a cat is in the close proximity of the door, a small RFID reader reads the tag and if the cat is authorized, a servo will unlock the cat door. The RFID reader and the servo controller are connected to an old laptop. The software on the laptop is written in Delphi and for each "cat door event" is sending a Twitter message and a picture to twitter.com:"
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