(be advised, the above video contains a few mild swear words)

The folks at opengadgets have created a little project called the “Talking Breathalyzer”:

A customizable Breathalyzer that talks and tells you how much you’ve had to drink. It’s also open source and can easily be modified with your own text on the LCD screen and audio MP3 files.

When tethered to a PC with a USB cable, it has additional features including character animations, Breathalyzer Tweets, text to speech, weather and stock read-outs, and a Photobooth feature.

This website contains instructions on how to build the Talking Breathalyzer yourself. A pre-assembled Talking Breathalyzer will also be available by mid Septemeber 2011 from Seeedstudio. The Talking Breathalyzer is not a professional Breathalyzer and should be used for Amusement Purposes Only.

You can check out the schematic here, and download the source here.