InFLak

there is a problem i think.

I built this circuit. I think it is not very useful.

And its citcuit in cement (or like thing)

The opened bottom of ist maker...

I think buy a drilled circuit pattern. Put it on pcb, where you want to drill. Drill the PCB, from holes of drilled pattern.

I have max038, I think i will make a waveform generator after my final exams.and drive my piezo But how can i drive piezo. Do you think Bu406 works? Or am i have to drive with power H-Bridge?

Do You think this is possible: The piezo have a capacitance. A inductor connected (parallel) to piezo. In every period, circuit goes damping as an LC lircuit.And its frequency is 1.7mhz. So, while circuits frequency not 1.7mhz, piezo works at 1.7 mhz. In every period, Piezo charged energy then goes damping. Is it right???

Yes audioguru i want to make my own mister(Mr,not miss :-)) But it is period still 2.7ms(=370Hz) Bu406 drives the transducer. But output is AC sinus wave? There was some connections to body inside mister. Do you think they provides AC current?

Hi, I bougt a mist maker. Than i open the piezo on top. I saw a ring, which is connected to piezo. Piezo is connected between body and this ring. THen i connect this ring and body to oscilloscope. On the box of mist maker , it is writed that it works at 1.7Mhz. i Put wet paper between water sensor and body, it lights on ,(it has lights which on while working.) Bu t i shocked! Osc. shows about 370.4 Hz, and it is like sinus wave , but not a exact sinus, it is like triangle. Then i push wet paper. The amplitude increases but frequency not changes. The vave form changes to sinus wave. 1 week ago i open a broken mist maker. There was only one driving transistor: BU406. But i cannot able to look properly the circuit. Becaouse they protect circuit with cement like thing. I wonder piezo changes the frequency? Do you know how can we drive this transduver? How. If not why it was 370.4Hz? Can youhelp me? :)