Teardown: Reverse engineering an ultrasonic cleaner - EDN
transformer - Driving high voltage to ultrasonic transducer with Arduino - Electrical Engineering Stack Exchange
Schematic of a Typical Ultrasonic Cleaner - Engineering Technical - PCBway
Hobby Circuit - Medium Power 40KHz Ultrasound Transducer Driver - Circuit designed by David A. Johnson, P.E. | Transducer, Circuit, Electronics circuit