I ordered one of these off Ali Express. An oscilloscope app showed it was about 40Hz vibration from the weight on the motor, far far from being ultrasonic. Got a refund, it ended up in the recycling.
Teardown Of A Scam Ultrasonic Cleaner
Submitted 2 days ago by tinosaurier@feddit.org to technology@lemmy.world
https://hackaday.com/2025/04/03/teardown-of-a-scam-ultrasonic-cleaner/
Comments
shiiiiiiiiiiiiiiiiiiiiiiiiiiiiiit@sh.itjust.works 1 day ago
Landless2029@lemmy.world 1 day ago
I bought a fake one off of Temu. It was so cheap why not.
Instantly knew it was fake once it was in my hands. Tried it anyway. Clearly just vibrating.
Returned it. They told me to keep it…
sugar_in_your_tea@sh.itjust.works 1 day ago
It was so cheap why not… it was fake
That’s why not.
theneverfox@pawb.social 1 day ago
Cheap doesn’t mean fake, just like expensive doesn’t mean quality… Not anymore
DrFistington@lemmy.world 1 day ago
If you need an ultrasonic cleaner, just go to harbor freight, they have decent ones for cheap. I bought one a few years back for carburetor parts a few years ago, and it does a great job
shalafi@lemmy.world 1 day ago
I got an AC powered unit off Amazon a couple of years ago. How can I tell if it’s fake? Jewelry comes out bangin’, but I’ve wondered it if should work even better.
Wife got this stuff last week and it seemed to make a dramatic difference.
OTOH, I can’t see this thing having a legit transducer. Anyway to tell without tearing it down? Guess that’s easy enough if I really care.
Should I try something rusty? Should a “real” one work for that?
jonathan@lemmy.zip 2 days ago
Mate, wtf is an ultrasonic cleaner?
unexposedhazard@discuss.tchncs.de 1 day ago
I can attest that they are great. I use them daily for cleaning stuff at work.
ilmagico@lemmy.world 1 day ago
Few years ago at work, people were using them to clean electronics after soldering, etc. but once, they did it on a board with a MEMS device, a gyroscope and accelerometer chip. Took them a while to figure out while none of them worked until they narrowed it down to the ultrasonic cleaner…
espentan@lemmy.world 2 days ago
How the heck do you clean your old carburators? /j
truthfultemporarily@feddit.org 1 day ago
I got one a while ago and they are great for cleaning small objects, and glasses. Basically ultrasonic sound waves get send through water, small cavitation bubbles form and rip off the dirt.
QuarterSwede@lemmy.world 1 day ago
Real ones are great but definitely more expensive. My wife has one that uses liquid and she puts jewelry in. Works extremely well.
prettybunnys@sh.itjust.works 1 day ago
Everyone has a plumbus
QuarterSwede@lemmy.world 1 day ago
Not this.
MonkderVierte@lemmy.ml 1 day ago
The toothbrush?