https://stream.echo6.co/videos/watch/6b9483d2-9a8f-49bc-b327-2c5346d8f80d This smoke detector is particularly interesting because it doesn't use the normal dedicated control chip, but instead uses what appears to be a very cheap and common microcontroller. I was reminded about this unit when Mike of the channel mikeselectricstuff mentioned he'd found a Chinese component supplier selling microcontrollers for 3 cents each (minimum of just 10). Better still, they do actually have an English manual and downloadable development environment. Sadly there doesn't appear to be a programming algorithm for the common universal programmers. Here's a link to Dave's video:- https://www.youtube.com/watch?v=VYhAGnsnO7w And a link to Mike's excellent channel:- https://www.youtube.com/user/mikeselectricstuff (It's really worth subscribing to.) The microcontrollers are OTP devices (One Time Programmable) so you would wreck one with every version of the software you tested. But hey, they're 3 cents each. And for the final production run they would just be a common cheap component on the PCB. 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 22:56:19 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/6b9483d2-9a8f-49bc-b327-2c5346d8f80d 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.