The arrays themselves are a 16 by 16 grid of cheap ultrasonic transducers on a PCB, fed by HV583 high-voltage shift registers.

Ultrasonic mist maker circuit Transducer driver circuit Below is the circuit diagram of the final part of the project — the transducer driver. As shown in the circuit diagram, it’s a tricky oscillator ...

Transducers have been designed, then fabricated with 80 μm and 130 μm diameter diaphragms, the latter in arrays with ~500 diaphragms. Receive measurements demonstrate functionality of both devices, ...