Gus Salavatore Calabrese wrote:

> I am really happy to read all the useful and inciteful ideas put forth.
>
>  I realize I did not supply enough information in my original post.
>
> ---->  I have been designing a vehicle tail light which would start  
> flashing at a slow rate
> as the brakes were applied and at a faster rate as the brakes were  
> applied harder.
> Ideally this unit would be standalone except for power ( which might  
> be solar provided ).
>
> I see no way to differentiate between braking and going downhill. Any  
> ideas ?   <---
>
> My desire is to build a product that will sell for $30-$50 max.  Less  
> would be great.
> The product requires NO skill to install.  If it requires power that  
> could come from the
> cigarette lighter socket.  The user can put it in the back window or  
> mount it anywhere
> they want.
> The desired result is to have the light FLASH to alert other drivers  
> to wake up.
> False positives are not that bad.  False negatives are to be avoided.
> If it works correctly 90% of the time it is certainly better than  
> "nothing".
>
> Your comments made me realize that another product could measure the
> speed at which a car was approaching the rear and flash the brake lights
> if the closing vector was excessive.  In addition, if an Italian  
> driver ( note
> my last name ) is following on the bumper, the light would flash.
>

   While I'm aware that The World Is A Very Big Place, I have to wonder 
how many places, like my state, restrict the use of blinking lights in 
civilian vehicles, other than turn signals.

- Rich

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