Cited as a reference · for some experience
Make your own Super Simple Ultrasonic Mist Maker
Why people recommend it
GreatScott builds an ultrasonic mist maker from a piezo disc, 555 timer, MOSFET and inductor; often referenced when people ask how the drive circuit produces oscillation.
Watch for: the LC and MOSFET drive stage that sets the oscillation
In their words
Here is good video to better understand how this thing is suppose to work.
ScienceDiscoverer on electronics.stackexchange.com, Oct 2021. CC BY-SA.
Much later he posted his final solution starting with a 555 NFET then going to a half bridge then back to 555 with Step Current limit and a half sine relaxation cycle.
Tony Stewart EE since 1975 on electronics.stackexchange.com, Aug 2021. CC BY-SA.
This video of Great Scott has been referenced many times here.
firemonkey on electronics.stackexchange.com, Feb 2022. CC BY-SA.
