PIR Sensor:

Here are some key features and information about PIR sensors:

1. Working Principle:
   • PIR sensors detect changes in infrared radiation emitted by or reflected from objects in their field of view.
   • They are "passive" because they do not emit any infrared radiation themselves; instead, they detect changes in the existing infrared radiation.
2. Detection Range:
   • PIR sensors have a specified detection range, which is the area in which they can sense motion.
   • The range is typically described in terms of distance and angle, and it can vary between different PIR sensor models.
3. Field of View (FOV):
   • PIR sensors have a specific field of view, representing the angle and direction in which they can detect motion.
   • The field of view can vary, and some sensors have a 360-degree coverage, while others may have a narrower focus.
4. Sensitivity and Time Delay:
   • PIR sensors often come with adjustable sensitivity settings to control the detection threshold.
   • Time delay settings allow users to configure how long the sensor should stay active after detecting motion.
5. Trigger Mechanism:
   • When motion is detected, PIR sensors generate an electrical signal or voltage spike, signaling the occurrence of motion.
   • This signal is often used to trigger other devices or systems, such as turning on lights or activating an alarm.
6. Dual or Multi-Element Sensors:
   • Some PIR sensors have multiple sensing elements arranged in an array. This design helps improve accuracy by reducing false positives and enhancing the detection pattern.
7. Applications:
   • PIR sensors are widely used in security systems for detecting intruders.
   • They are also used in lighting control systems to turn lights on when motion is detected and off when the area is vacant.
   • PIR sensors find applications in home automation, occupancy sensing, and energy conservation.
8. Mounting and Installation:
   • PIR sensors are typically mounted at a certain height and angle to cover the desired area.
   • Proper installation and calibration are essential for optimal performance.
9. Power Consumption:
   • PIR sensors are designed to be energy-efficient, consuming minimal power when in standby mode and activating only when motion is detected.
10. Environmental Considerations:
    • PIR sensors may be affected by environmental factors such as temperature, humidity, and airflow. Some sensors come with features to compensate for these conditions.