If you want too much information about a couple of cats, see Gus and Penny’s Twitter page. These cats Tweet! Or, more acurately, their cat door Tweets when they go in and out. The door isn’t the famous Flo Control Project, but instead uses RFID chips.

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:

Link

From the Upcoming ueue, submitted by e1ghip.