I would like to start by saying my experience in electronics is very limited and I will include pictures of everything. I am, however, trying to assemble a device which puts a current through a piezoelectric transducer to resonate at ultrasonic frequencies and atomize liquid water (hopefully).
I have found two cheap "humidifiers" on eBay with high resonance frequencies (1.7/2.4 MHz) and low current requirements. The power source I would like to use is a 3.6 V/15 A battery. My understanding is the piezo-transducer will resonate according to the frequency of its AC current.
My question is: What is the most cost-effective method to convert my DC battery to AC with the frequency of 1.7 MHz & 2.4 MHz (these will be separate circuits)? Is there something I can use as an inverter but with variable frequencies, and would it matter if the waveform was square or sine?
Also, I think I will probably want to step-up the voltage, but I don't know how that would factor in here.
I've removed images of the previous transducers as they are lacking specifications. Below are links to a transducer and spec sheet which seems to be better quality. This transducer runs on 1.65 MHz and it is different from those previously posted, so please be sure to take a glance at that spec sheet. As far as power, I have had trouble figuring out how volts/amps/watts relate to the rate the water atomizes at. I assume I would adjust the amps and keep the volts consistent to adjust this factor?
Also just to add to my question, I need to prove this is all done in compact, energy efficient, and relatively cost efficient manner because this design would need to be reproducible on a larger scale. It may be the kind of thing where I actually have to test it out to narrow down the right amp/voltage, but for now let's just assume the power is the max 30 Watts.