How microwave body detectors work. With RF section schematic.
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.
Видео How microwave body detectors work. With RF section schematic. канала bigclivedotcom
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.
Видео How microwave body detectors work. With RF section schematic. канала bigclivedotcom
Показать
Комментарии отсутствуют
Информация о видео
Другие видео канала
#135 Radar Sensors / Switches: Comparison and TestsBuilding the Dept of Villainy LED neon controller.5G death beams are rubbish for killing your foes.Safe USB version of the Gillian's Diamonds lamp. (With PCB file.)84 Year Old Radio Receiver Restoration! Stromberg-Carlson 145LAmazing idea of relay module using microwave motion sensorPower saver plugs just got a bit darkerStar NX-2420: Color Dot Matrix Printer from 1990How to Troubleshoot Electronics Down to the Component Level Without SchematicsAir freshener cross-breeding. (mild profanities)RCWL-0516 Microwave Proximity Sensor - With & Without ArduinoFixing a microwave body detector.Low class inline dimmer from eBay. (with schematic)Shorting out a fully charged cheap lithium jump starter. (It didn't end well.)RCWL-0516 Microwave & HC-SR501 PIR Motion sensors | Tutorial with ESP32 and LoRa ProjectMicrowave Motion SensorInside a fake un-trippable circuit breaker.Limited edition prototype kit LED coaster build and giveaway.Building a USB powered PIR/Radar adaptor for LED strings.Poundland's PIR LED tape. Worth buying just for the sensor.