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Old 10-22-2019, 03:24 PM
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altrez altrez is offline
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Join Date: Jun 2009
Posts: 556
Quote:
Originally Posted by wrtner View Post
Is anybody working in this area?

I notice that one can buy two ultrasound transmitters, pitched at 40khz, and a driving board for around 35.

The snag is that one needs to examine the board, see what it takes to adjust the existing fixed frequency.

https://www.ebay.co.uk/itm/2X-50W-40...AAAOSwrFxbbP8L

But typing the number on the board, 13913887466 100W, does get us to what purports to be a circuit diagram - but without any 555 or similar chips.
I have done some experiments with it and it is very interesting. I used a Function Generator some diodes and a few ultrasonic speakers.

Leads into Bubble Fusion.
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