[sdiy] Proximity detector

[Glen]

At 07:36 PM 3/17/04 , Peter Grenader wrote:

>Look at Robot e-stores.  These are quite common. There's chip and a small
>assembly available with a UV led.sensor pair which returns a voltage
>proportional to the distance to the object the UV light is bouncing off of.

UV?  I'm not sure this is the best thing for detecting a human body,
because the human body absorbs UV instead of reflecting it. I even have
UV-illuminated photos of humans to prove it...

http://webpages.charter.net/glenweb/temp/Lisa.html

;)


later,
Glen Berry