Electronic Distance Measurement - Help Wanted

[Ed Hall]

Hello,

A group of high school students is working on a project which involves using
ultrasonic sensors to measure small distances (around 6 to 60 inches).

There are a large number of possible transducers / sensors.

Anybody have any experience and can suggest a source of circuit ideas for
them to experiment with?

Thanks
Ed.

 

[neon]

there now this type of circuits available comercialy for cars $37

 

[Ed Hall]

Stephen. Fantastic. Thank you.

Try these links for a starting point.
http://www.micro-examples.com/public/microex-navig/doc/090-ultrasonic-ranger.html
http://www.best-microcontroller-projects.com/pic-sonar.html