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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