Hello,

I'm looking now for ultrasonic distance sensors. Speed of Sound is far more in a PIC's capacity range than "Light Speed" ( Alain).

My search by DIGIKEY, DISTRELEC, FARNELL, REICHELT, CONRAD and lots of suppliers one can find in the internet, but I'm unsuccessfull.

I found ultrasonic sensors for distances up to 37ft (11 meters) which is almost okay but their price is high (> $500.-!!!).

Does anyone have a suggestion where I could find those elements?

Is there another "electronic" way to measure 1 to 10 meters distances?