Re: Traffic - Signal Devices Threaten Chaos

John F. Carr <[EMAIL PROTECTED]> wrote:

>Many light sensors -- including the chips found in digital cameras -- are
>sensitive to near infrared.  Remember the Sony video recorder that could
>see through clothes?  That was a visual band camera responding to infrared.

No, I don't remember that, but whatever.  Build one, try it out, and let us
know how it works.