Vibrator Circuit Use Ultrasonic Driver Circuit 2000W 28kHz/40kHz for Ultrasonic Transducer - China Ultrasonic Generator PCB, High Power Ultrasonic Generator PCB | Made-in-China.com
Hobby Circuit - Medium Power 40KHz Ultrasound Transducer Driver - Circuit designed by David A. Johnson, P.E. | Transducer, Circuit, Electronics circuit
Amazon.com: YaeCCC 110V Ultrasonic Cleaner Power Driver Board with 2PCS 50W 40K Transducers : Industrial & Scientific