Building an interlock device for DUI parolee.

[Simon]

I will install a device that prevents anyone with an alcohol level
over 0.08% BAC from driving. I am thinking of a keypad to enter his
phone number or social security number within xx seconds or something
better. I could try a breathalyzer, but this would be inconvenient to
other sober drivers. What are some of the best way (or device) I could
use to prevent a drunk person from starting his car?

Thanks

 

[Dave]

Simon wrote:

I will install a device that prevents anyone with an alcohol level
over 0.08% BAC from driving. I am thinking of a keypad to enter
his phone number or social security number within xx seconds or
something better. I could try a breathalyzer, but this would be
inconvenient to other sober drivers. What are some of the best way
(or device) I could use to prevent a drunk person from starting
his car?

Thanks

I presume you are describing a situation where this is not an order of
the court but is a voluntary precautionary addition? Seems like some
sort of confusing reaction time measurement might work to some degree.

 

[John Woodgate]

I read in sci.electronics.design that Bob Monsen <rcsurname@comcast.net>
wrote (in <NpudncGgEeBgxPrfRVn-hQ@comcast.com&gt about 'Building an
interlock device for DUI parolee.', on Thu, 21 Apr 2005:

The day I was to demo it for the final grade, I had stayed up the
entire night before building it and tweaking it. Each student was given
a maximum of 10 minutes of time to show their project. Unfortunately, I
was so tired that I couldn't 'pass the test', at least at first. I
guess I had that monostable timer set to go off a bit too quickly. I
finally got it to go 'green', after about 10 tries, to the cheers of my
classmates. Afterwards, they all took turns trying to beat it.

These devices are not fitted in cars because elderly politicians and
judges can't pass the test.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk