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PAPPP 2020-07-27 12:55:06
It's an ultrasonic atomizer, works exactly as pictured. Powers from MicroUSB, which is quite convenient. Set the transducer smaller-metal-area side up on a wet sponge with a little pressure or not-fully-submerged in a pool of liquid, turn it on, and get a plume of atomized liquid. On/off button on the board operates electronically (latches on/off while powered, always off at power-up), would be easy to solder on an external control wire. No markings on the IC. Does produce a slight audible tone when turned on. I'm not even sure what I'm going to use them for, but it was cheap and neat so I had to try one.
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