Using ultrasound speaker with arduino

Can someone show me a direction to use ultrasound speaker to send 40 khz sound wave and read the returned signal?

Thanks

Don't the Ping modules do just that?

http://www.parallax.com/Store/Sensors/ObjectDetection/tabid/176/CategoryID/51/List/0/SortField/0/Level/a/ProductID/92/Default.aspx

I think there's Playground info on using this too.

Can someone show me a direction to use ultrasound speaker to send 40 khz sound wave and read the returned signal?

Whilst it is relatively simple to drive the output pulses directly from the Arduino, it is best to amplify both the outgoing and incoming signals.
If you haven't got an oscilloscope, I suggest you don't think about making a sonar from scratch.

CrossRoads:
Don’t the Ping modules do just that?

http://www.parallax.com/Store/Sensors/ObjectDetection/tabid/176/CategoryID/51/List/0/SortField/0/Level/a/ProductID/92/Default.aspx

I think there’s Playground info on using this too.

I already have this sensor but I need a waterproof sensor. Finally I found one but it’s just a speaker without ping module.

AWOL:

Can someone show me a direction to use ultrasound speaker to send 40 khz sound wave and read the returned signal?

Whilst it is relatively simple to drive the output pulses directly from the Arduino, it is best to amplify both the outgoing and incoming signals.
If you haven’t got an oscilloscope, I suggest you don’t think about making a sonar from scratch.

I’ve a friend who has a oscilloscope, may be I can borrow it :slight_smile: thanks for the advice…

Waterproof? As in underwater, or just outdoors?

I m going to use it in outdoor environment,because of that it has to be weatherproof.