What is a Motion-sensing light?
A Motion-sensing light is turned ON as soon as the motion sensor detects you. Most of the motion sensors in this gadget are using infrared for detection mechanisms.
Before understanding this mechanism first of all let me tell you that motion sensing can be achieved by using other techniques also like ultrasound, microwave, or photosensor. All of these are techniques are using active sensors. They emit some kind of energy (sound, microwave, or light) into the environment to detect a change of some sort. The motion sensors of most of the lights (including other security systems) are using passive sensors that detect infrared energy. These sensors are therefore known as PIR (Passive Infrared) or Pyro-electric sensors. Infrared energy detected by this passive sensor and it turned ON the Motion-sensing light.
We have a brief about the motion-sensing technology of this instrument. Now it’s time to see the engineering behind this gadget.