I found some youtube vids on Ultrasonic Cleaning, and thought it would be a cool DIY project. On eBay I found this. Some other transducers in the same range requires 400-800V supply. Anyone have any idea how to drive this thing? What kind of signal does it need? My guess is a 40kHz sine wave in the voltage supply range.
I was thinking a sine wave generator, and stepping it up to 400V++, mabye change the Watt/voltage with a potmeter.
The same seller on eBay also sells the driver board, but I want to make it myself. The images seems to include trafos, something three-legged that needs coolig and some passive components.