https://stream.echo6.co/videos/watch/34150cc3-f26b-4a05-a76d-7c808ab70ada Between the weird microcontroller with integrated boost converter and a spectacularly complex 3D moulding, this humble air freshener is an education in cost optimisation. The grey moulding inside could be classed as art. I thought this was going to be an easy video to make. Especially when I saw the minimalist PCB. But it had me puzzling for a while. I haven't a clue who makes that weird microcontroller. It's the first time I've seen one with a boost converter built in. In hindsight the choice of the switching components may have been down to the drive voltage. The discrete transistors are getting a solid 5V gate current, but the positive pair can only be pulled down to near 0V from the battery supply which is between 1 and 1.5V, and that would be a very low gate current if it's a MOSFET. 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. Mon, 13 Apr 2026 20:43:54 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/34150cc3-f26b-4a05-a76d-7c808ab70ada 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.