No documentation? Boo.

hahaha that is hilarious. I can see it being a blast, but totally irresponsible.

reminds me of the tucker max story.

we have one of these at our house at university. The highest BACs are put on the wall of fame!

.05? In Florida is .08 that means we are allowed to drink more.

or have it connected to your computer: no email or other messages, when over the limit.
- and that might even be useful.

Hate to break it to you, but I can have a few beers, then hold some everclear in my mouth for a minute and beat all your scores without drinking nearly as much. Suckas.

Breath doesn’t determine BAC, BAC does. Breath CORRELATES with BAC.

Cheers.

*correction*

BAC = Blood alcohol concentration. This is somewhat accurately determined by the alcohol content of the breath you exhale. Obviously having alcoholic substances in your mouth at the time of reading will screw it up big time.

I often thought building something like this could be quite useful — or quite dangerous, both of which have been pointed out.

On the tech side, it does seem calibrating it would be the trick. Maybe a score 100 means 0.10%? Nah, too easy. But even if… even the units used by police here have problems with calibration and need regular checking and recalibrating.

But if it could be done maybe responsible hosts or bar owners could legally hold somebody’s car keys until they fell to the legal limit.

On an editorial note:
Wow, 0.02% in Sweden and 0.05% in Australia (stereotyped home of big Fosters cans & “Croc Dundee”-style drinkers)… hard to believe many Americans complain about being in an over-regulated nanny state with most places allowing from 0.08 to 0.10% as the limit! The US can legally drive drunker than others.

There’s something to be proud of!

Hehehe, cool, based on the http://www.danielandrade.net/2010/03/07/building-an-breathalyzer-with-mq-3-and-arduino/

:)