A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in FIR-based motion detectors.

The system works in the following steps:

  1. The controller software developed is kept running and checks if the camera is turned ON.
  2. When an intruder comes in the detection range of the FIR sensor, the sensor generates an output of 3.3 volts.
  3. This output is further amplified and is used for activating the relay of the lighting system and the camera.
  4. Once the lamp and camera are actuated with the output from the amplifier, software finds the camera is turned ON.
  5. The software starts to save the video captured by the camera on the server.

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