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:
> 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  
> signature text are to be deemed to be released to the public domain as  
> of the date of this communication .
>
>   
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