This gadget is called CATaLOG, cat tracking/logging system based on Arduino, RS232 RFID module, and Arduino Ethernet Shield.

The author Pete has open sourced the code so if you got some soldering skills, just get the parts, simply put it together, load the code, and you should be set to go so you can track your cat via twitter.  (You can see an example of the device working @BobbinAndTuffin.

(screenshot of @BobbinAndTuffin)

The CATaLOG project aims to track our two cats Bobbin and Tuffin as they go in and out of the house so we can see which cat spends more time outside, what their favourite time to go out is, and also get sent SMS messages if a cat goes missing for a certain amount of time.

Great job Pete and make sure to let us know on any future Twitter Hacks via @TweetHacking.

CATaLOG Homepage

via hackedgadgets

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Now, this might look very useless but it can come in handy for security applications or other DIY projects that need status updates via Twitter.

Here’s the screenshot of @hereandaway, which will tell you how far Josh is sitting from the computer:

Great job Josh, let us know on any new updates with your cool sonar project, perhaps you can make a wireless version and stick it on your dog…

arduino & sonar returns your distance away from the computer and it is displayed on the screen. the farther away you are from the computer the larger the text and the greener the screen. the closer you are, the smaller the text and the redder the screen. get within 5 inches and a buzzer alarms. distance is twittered.

via hacks blog

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I am sure you can recall countless times waiting helplessly at a laundry room, now there’s a better solution, make yourself one of these tweeting washing machines.

You will need the following and a little hacking will be involved:

BS2 – Basic Stamp 2 or even CUBLOC modules work too. (or Arduino) – These are basically microcontrollers you can program in BASIC language, very easy to program.

BetaBrite – BetaBrite sells these giant LED modules which can easily be hooked up to a Basic Stamp to display messages.  Of course, these might actually have ethernet connectivity too, in which case you can “tweet” the status to Twitter.

Here’s a screenshot of what kinds of tweets you can expect after washing your clothes: (@pimpy3wash)

Can you imagine now how helpful this gadget would be for you?

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Here’s a screenshot of the updates on the Tweeting Cat Door, you can follow @GusAndPenny.

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

via diy blog

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