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Technology @lemmy.world

tinosaurier @feddit.org

4d ago

Teardown Of A Scam Ultrasonic Cleaner

Teardown Of A Scam Ultrasonic Cleaner

23 comments

I found one of these fakes on the shelves at CVS!
I'm pretty proud I got something banned after a letter.

Everyone knows that ultrasonic cleaners are great
Mate, wtf is an ultrasonic cleaner?
Edit: this is a rhetorical question, I'll read the article.
- I can attest that they are great. I use them daily for cleaning stuff at work. Much bigger ones than these tho.
  Ironically he says cleaning electronics will damage them, but thats exactly what im doing. The frequency and strength is the important part here. He generally has no understanding of electronics and makes some stupid nonsense claims about the circuit of the real one, but thats not the focus of the video so idc.
  
  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...
- How the heck do you clean your old carburators? /j
  
  Mate, wtf is an old carburator?
- 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.
  
  Real ones are great but definitely more expensive. My wife has one that uses liquid and she puts jewelry in. Works extremely well.
- Everyone has a plumbus
- Not this.
- It's the best sonic cleaner available. There is no better sonic cleaner.
- The toothbrush?

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.

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...
- It was so cheap why not... it was fake
  That's why not.
  
  Cheap doesn't mean fake, just like expensive doesn't mean quality... Not anymore

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

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? Also, it gets the water pretty hot. Is that an indicator?

23 comments