16:13

Passive infrared motion sensors: a two-bit camera powered by crystals

11:54

PIR motion detector - HOW IT WORKS (easy to understand)

32:56

Best Motion Sensors for Home Assistant (WATCH before you BUY!)

7:43

Effective Ways To Detect People With Common Sensors

12:22

Ultimate Guide to Smart Home Sensors + ideas

21:01

PIR Sensors And How To Use Them

31:24

ABANDONED TOWER - Floor 23 downwards (lift shafts and motor rooms)

24:33

How to Set Up an IP Security Camera System from Scratch