> Date: Tue, 5 Jan 2016 11:30:16 -0600 > From: BOB bobscnc@charter.net > To: "Microcontroller discussion list - Public." >=20 > I found the omni directional transducer. They are made by a company in=20 > Canada called Benthowave. The only problem is the priceing starts at =20 > $985.00 and goes up from there. This drives the price up above what I=20 > can afford to spend on the project. >=20 > I have had some suggestions of home made ones that I am going to=20 > experiment with. > One interesting one is to put a piezoelectric speaker in vegetable oil=20 > in a sturdy plastic bag and seal it. Very crude but it seems functional= .. > I am going to find and order some piezo parts out today and start to=20 > experiment. > I will post some results. At that price I would consider six or seven ultrasonic transducers and scan= round them. When I needed some waterproof transducers I bought a very cheap reversing s= ensor system and threw away the controller, from memory the angle they cove= r is fifty or sixty degrees. James =20 --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .