Not sure about that,
Do you know of a very simple circuit that would work? I'm trying to keep it as simple as possible.
Maybe I should take it apart and see what driver it is using.
I've tried several permutations with the above 555 circuit, at 12V, but I cannot get the output to be greater than 8V. Any idea why that would be?
How are you measuring the output voltage?
I am using a cheapish multimeter.
... I cannot get the output to be greater than 8V. Any idea why that would be?
If it's a square wave, the average (and RMS) voltage is about 6V.
If you had an oscilloscope you'd see the waveform shape and you could read the peak voltage.
How about usic a CAPACITANCE CERAMIC RESONATOR to run the buzzer?
The lowest frequency one is in the order of 2MHz.