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Gadget Freak Case #207: Android Breathalyzer in an Altoids Box
3/2/2012

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Angel
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Iron
The Android APP
Angel   12/11/2012 8:47:50 PM
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I think your idea is genius!!! It sounds like a perfect way for parents to ensure their children's safety when they are away at college. Can you e-mail me at angel.maldonado.r@gmail.com, so that we can speak about your product? Thanks

Cadman-LT
User Rank
Platinum
Re: Bluetooth Gadgets
Cadman-LT   5/31/2012 9:41:54 AM
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Yes, unavoidable must certainly be a matter of opinion. Seems to me every drink is definitely avoidable under any circumstances.

Rob Spiegel
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Blogger
Re: Great for Safety
Rob Spiegel   3/27/2012 11:03:55 AM
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Good point Tool-maker. So this is not technically a mandate to purchase. Like auto insurance, you only have to buy the tool if you choose to drive. 

Tool_maker
User Rank
Platinum
Re: Great for Safety
Tool_maker   3/26/2012 4:54:20 PM
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I am not sure if it is up to the judge's descretion or it applies to everyone in Missouri, but it is great for his business. However, the customers are not forced, they can forego driving.

Rob Spiegel
User Rank
Blogger
Re: Great for Safety
Rob Spiegel   3/26/2012 3:51:39 PM
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Wow. So I take it that the law requires those convicted of DUI to have these systems installed. That creates a good number of forced customers.

Tool_maker
User Rank
Platinum
Re: Great for Safety
Tool_maker   3/26/2012 3:28:44 PM
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Perhaps attitudes are changing, but my nephew owns a company that installs car audio systems. For the past year the overwhelming bulk of his work has been installing breath interlock systems in the autos of people convicted of driving under the influence. Too many people are sure they are the only people on the road who can handle the amount of alcohol they have consumed.

Leigh
User Rank
Silver
Re: Sensor problems
Leigh   3/8/2012 1:37:29 AM
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As an engineer who designed a standards certified breathalyser 10 years ago, you are correct about the selectivity issues of semiconductor sensors. They also have issues around flow rates influencing readings.

We used an inhouse assembled platinum catalyst phosphoric acid micro cell with a solenoid driven silicone bellows to sample the airstream after 1.5 litres of air been expelled. The ethanol would be 'reacted' fuel cell like to produce a peak in around 5 seconds. Even then stated accuracy was +-10%.

This is the method most law enforcement units use. Evidential units will normally use infrared with pre and post sampling of a reference gas.

Rob Spiegel
User Rank
Blogger
Re: Bluetooth Gadgets
Rob Spiegel   3/7/2012 3:23:04 PM
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That is an astonishing statistic, Chuck. I had no idea it was that high. Makes you wonder how high the percentage is for texting and talking on cell phones. In some cases, cell phone records are used to see if the driver was on the phone when a fatal accident occurred:

http://www.heraldtribune.com/article/20110906/article/110909748

Charles Murray
User Rank
Blogger
Re: Bluetooth Gadgets
Charles Murray   3/6/2012 6:18:34 PM
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You're absolutely right, cvandwater, it actually is very simpl to avoid driving drunk. Yet, somehow, 32% of our annual highway fatalities in the U.S. are caused by drivers over the limit. Seems incredible, but it's true.

http://www.alcoholalert.com/drunk-driving-statistics.html

Rob Spiegel
User Rank
Blogger
Re: Sensor problems
Rob Spiegel   3/6/2012 2:30:54 PM
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Thanks for the link, Al. that was good thinking to avoid adding a Blood Alcohol Content reading to the app. Very responsible. That could certainly be used to justify what might actually be drunken driving.

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