How microwave body detectors work. With RF section schematic.

How microwave body detectors work. With RF section schematic. https://stream.echo6.co/videos/watch/30721af6-1b06-488f-9a0b-f4fbbc15850a When I first took a microwave triggered lamp apart in a video I joked about the hidden chip being a standard PIR body sensor chip - and was then aghast to find that it WAS. Which meant that all the microwave signal generation and movement detection was being done by a single transistor and some cunningly designed PCB tracks. I'll openly admit that microwave circuitry is such a specialist area where the only people who truly understand it are those who work with that type of circuitry all the time. It's not just a specialist area of electronics, but a specialist subsection of RF design where simple things like tracks stop behaving like conventional conductors. Now I understand this circuitry better it all makes a lot more sense. It's got strong similarities to the Colpitts oscillator FM micro transmitters I used to make for the 88-108MHz frequencies - not 300MHz as I mentioned in the video. (Well not deliberately.) The chip being used on this breathtakingly cheap and versatile module is a customised BISS0001 with a rarely used pin repurposed as the input to an internal 3.3V voltage regulator. That removes the need for a separate regulator on the PCB. Here's a search link to find these modules on eBay. Target price less than a US dollar each:- https://www.ebay.com/sch/i.html?_from=R40&_nkw=microwave+module&_sacat=0&LH_TitleDesc=0&_sop=15 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 16:16:14 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co How microwave body detectors work. With RF section schematic. https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/30721af6-1b06-488f-9a0b-f4fbbc15850a 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.