https://stream.echo6.co/videos/watch/3d8b159b-1193-4d78-8964-e76662370a20 A look at a very common little atomiser module sold on eBay. This style of circuit is often found in the USB powered desktop humidifiers that use a wick and piezo disk to put a visual stream of moisture into the air. This is a very minimalist circuit, which makes it very interesting. There's no feedback, so the microcontroller is just banging out a rough 110kHz to the 16mm piezo disk. I really went to town on reverse engineering this module, including desoldering and measuring all the capacitors, and unwinding the little transformer to count the windings and measure the wire diameter. To find these on eBay search for - usb humidifier module It's often cheaper to buy a multipack, plus that gives you spares. 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. #ElectronicsCreators Wed, 15 Apr 2026 11:29:01 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/3d8b159b-1193-4d78-8964-e76662370a20 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.