Microwave movement detector module

[cjdelphi]

I came across this and i had to buy one the price, claims it can sense movement behind thin walls

It uses Doppler radar technology, with auto-sensing capabilities to control other product,High sensitivity, sensor distance, reliability, wide angle sensor,Wide supply voltage range and other characteristics. Widely used in lighting situations,anti-theft alarm situations.

Features:
1. microwave sensors using planar antenna and receiving echo.
2. The switch is active sensors.
3. The sensors emit a high-frequency electromagnetic waves and receives their echo.
4. The sensors detect changes within echo.
5. The sensors detect tiny movement in detect range.
6. Send signal to MCU and execution instruction.
7. Signals are likely to be detected through the door, glass and thin walls.
8. It will get best probe result if person or object when moving toward the sensor.
9. This product is a strong anti-jamming capability, almost without wind, heat and other environmental factors foreign interference

Parameter:
1. power supply voltage: 3.3-20VDC;
2. the quiescent current: 4MA;
3. module size: 23*33MM
4. the transmission power: < 2mW;
5. the output signal: TTL (3V/5V), repeat triggering
6. sensing distance: 4-8 meters;
7. detection angle: 180 degrees;
8. the time delay: The default setting 20S/30S (adjustable).
9,. Installation: housing supporting the installation/T8 split, integrated installation

 

[Colin Mitchell]

I bought one and it works but not behind walls.

 

[cjdelphi]

Brick walls?

 

[Bluejets]

Used a couple of them now.
Pain in the neck as customer complains about light coming on in the cupboard all the time, not just when they go to open it.
It was their suggestion initially and all the resons why not to use it fell on deaf ears.

http://www.banggood.com/500W-Microw...ing&utm_content=jude&utm_campaign=ele-xiao-au

 

[cjdelphi]

Interesting, i'll certainly find the limitations