These little units were originally sold as beauty aids that misted your delicate skin with water in a dry office environment. They seem to have become very popular, and the circuitry has evolved to a minimalist approach.
There's a possibility that these units could be used to nebulise alcohol for inhalation, but it should be noted that you are effectively inhaling a solvent. It's not recommended.
The older unit I melted with "air freshener" chemicals was much more complicated inside. It seemed to have current sensing on the primary of the transformer. Presumably to maximise efficiency by operating at its resonant frequency. The new approach of software set frequency is much simpler.
The lithium cell is very much a small token gesture 150mAh one to make the unit rechargeable. The slim unit charges it at an appropriate 100mA, while the larger round one charges at 500mA suggesting intent for a larger cell.
Here's an eBay search link to find these units:-
https://www.ebay.com/sch/i.html?_from=R40&_nkw=facial+steamer&_sacat=0&_sop=15
Target price around $5
Interestingly, I had neglected the melted unit long enough for the lithium cell to over-discharge and puff up. When I gave it a recharge the cell seemed to reabsorb the gas and shrunk back down to its normal "vacuum packed" size.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.

11 thoughts on “Inside a usb rechargeable misting unit with schematic”
  1. Avataaar/Circle Created with python_avatars The ECE Effect says:

    Can anyone tell me the output frequency of microcontroller which is connected to gate of mosfet and which type of frequency ?? I supposed it to be a square wave am I right?

  2. Avataaar/Circle Created with python_avatars Endy Mallorn says:

    Question, what if you were to solder two matching capacitors across the C1 & C2 spots?

  3. Avataaar/Circle Created with python_avatars Respawn Restricted says:

    I got one of them I filled with alcohol for disinfecting my cotton mask

  4. Avataaar/Circle Created with python_avatars avada says:

    I wonder if this works with more viscous liquids. Like oils.

  5. Avataaar/Circle Created with python_avatars Zack Stewart says:

    I should hope you and Ralfy took vape hits of whiskey.

  6. Avataaar/Circle Created with python_avatars CommAndroid says:

    I just bought it, round one because you liked it more because of stability xD for 4.3 dollars with shipping from China to Pakistan. And man this thing is lit, I like it. Inhaling water spray makes me smell some aroma that I get feel in air conditioner or inside refrigerator. Current draw from usb when running with fully charged battery was 200mA. Advertised as 500mAh battery, should run for 2H+ but I highly doubt it. Mine auto turns off after 1 min which is annoying.

  7. Avataaar/Circle Created with python_avatars Ron Layne says:

    I think the output transformer is actually an autotransformer

  8. Avataaar/Circle Created with python_avatars Jek says:

    Oh my god. I have the exact rounded one, I accidentally take off the rubber and it is really a pain in the ass to put it back on!!! LOL

  9. Avataaar/Circle Created with python_avatars Viktor Bundalevski says:

    How to lure Ralphie over
    Clive: puts whiskey in the atomizer

  10. Avataaar/Circle Created with python_avatars Steve Barnes says:

    I am not going to say anything about the thumbnail for this video.

  11. Avataaar/Circle Created with python_avatars Justin W. Charles says:

    I really enjoy your videos, so much knowledge ๐Ÿ˜€ and the way you explain it, its just a lot of fun listening to you explain it so well ๐Ÿ™‚ keep up the good work ๐Ÿ––

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