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Date: 07/30/01 at 7:39 PM
Posted by: David Cary
E-mail: d.cary@ieee.org

In Reply to: usage of combined type ultrasonic sensors posted by Peter Bozzay on 05/17/01 at 7:19 AM:

Have you looked at the Polaroid 6500 Sonar Module ?
There seem to be a lot of people playing with it
http://rdrop.com/~cary/html/ultrasonic.html
.

Most people just stop driving the transducer,
wait for it to stop ringing, then listen for the return signal.

Have you seen ``active damping'' ?

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