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'[EE] Want to detect auto turn signal blinker lig'
2009\03\07@204300 by Michael Algernon

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I want to build a product that can be mounted looking at the  
instrument panel that will be capable of detecting the turn signal  
blinker lights even in bright sunlight.  I want to alert the driver if  
the signal has been on for 30 seconds or more.  One thought I had was  
to look at the instrument panel with opto sensors that filter RGB and  
look for the particular color of the blinkers plus detect the periodic  
nature of the blinkers.
I am asking for suggestions about how to proceed.
MA
 WFT Electronics
Denver, CO   720 222 1309
" dent the UNIVERSE "

All ideas, text, drawings and audio , that are originated by WFT  
Electronics ( and it's principals ),  that are included with this  
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of the date of this communication .

2009\03\07@205105 by Carl Denk

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Wouldn't be that difficult to get tapped to the turn signal circuit
itself, then use that to power an opto isolator. This could all be
hidden.  The circuit should have wires under the instrument panel at the
steering column. Need to watch for 4 way flashers as a special case.

Michael Algernon wrote:
{Quote hidden}

2009\03\08@010619 by Vitaliy

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Carl Denk wrote:
> Wouldn't be that difficult to get tapped to the turn signal circuit
> itself, then use that to power an opto isolator. This could all be
> hidden.  The circuit should have wires under the instrument panel at the
> steering column. Need to watch for 4 way flashers as a special case.

At least in theory, on some vehicles this information is also available on
the OBD port (I was just reading the standard that describes the message
format).

A question for the OP: how do you envision this thing, from the user's POV
(unless it's a secret, of course)?

Vitaliy

2009\03\08@033449 by Nate Duehr

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On Mar 7, 2009, at 11:05 PM, Vitaliy wrote:

> A question for the OP: how do you envision this thing, from the  
> user's POV
> (unless it's a secret, of course)?

After 180 seconds of continuous blinker activity, it will play someone  
yelling, "Hey dumbass!  You don't know how to drive and are a danger  
to others!  Take public transportation next time!" from an ICD chip  
through a well designed 7W or greater audio amp (the upgraded next  
year's model will be called the "Wake the Dead, or at least Grandpa"  
version)  and a minimum size 5" speaker "inconspicuously" mounted in  
the driver's headrest.

With options for male and female voices just for the "wow" factor.

:-)

Nate

2009\03\08@084446 by olin piclist

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Nate Duehr wrote:
> After 180 seconds of continuous blinker activity, it will play someone
> yelling, "Hey dumbass!

You have to keep in mind there are occasions where the blinker might be on
legitimately for more than a useful timeout.  Imagine being stuck in traffic
in the right turn lane.  If you're doing it right, you have the blinker on.
I can think of some intersections and times of day in the Boston area where
you could be sitting there for minutes.  On the other hand waking up the
driver by telling him he is a dumbass might help break up the boredom.


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