This video about How PIR motion sensor works and how to make safety alarm in home. Review Sinhala.

Tins video contains using Passive InfraRed sensors (PIRs) are electronic devices which are used in some security alarm systems to detect motion of an infrared emitting source, usually a human body. All objects, living or not, whose temperature is anything above absolute zero emit infrared radiation.
ආයුබෝවන් කියල පිලිගන්නවා අපේ යූටියුබ් චැන්ල් එකට
කාර්මික ශිල්පය පිලිබඳ උනන්දුවක් දක්වන ඔයලටයි මේ චැන්ල් එක​.
මල්ටි ටැලන්ට් කාර්මික ශිල්පියෙක් වෙන්න අපේ වීඩියෝස් බලන්න.
විදුලි කාර්මික ශිල්පය
ශීතකරණ හා වායුසමීකරණ කාර්මික ශිල්පය
ජලනළ කාර්මික ශිල්පය
වඩු වැඩ ශිල්පය
නව නිපැයුම් නිර්මාණ
ගෘහ විදුලි උපකරණ අලුත්වැඩියා කිරීම​
රෙසින් නිර්මාණ
මේ හැම අංශයකම දැනුම ගන්න අපේ චැන්ල් එක සබ්ස්ක්‍රයිබ් කරන්න​.
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