A motion detector is a device that detects moving objects, particularly people. A motion detector is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area. Motion detectors form a vital component of security, automated lighting control, home control, energy efficiency, and other useful systems.
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Have you ever sat on a hillside in the dead of the night, gazed towards the heavens, and thought, “why oh why, dear lord, ...