After my ultrasonic cleaner failed after not using it for two years ... To better understand the circuit, I reverse-engineered the PCB and came up with this schematic. The 2.2µF capacitor is not ...

This ultrasonic cleaner by [Branchus Creations] started off as a standard stainless steel laundry sink, but with the addition of a few transducers it really turns up the volume. They are attached ...