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    HC-SR501 Infrared Human Motion Sensor

    HC-SR501 Infrared Human Motion Sensor

    KSh 200.00

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    Absolutely, the HC-SR501 is a versatile and popular infrared sensor for detecting human motion in various projects. Here’s a more comprehensive breakdown of its specifications and functionalities:

    Detection Technology:

    • Passive Infrared (PIR): Senses heat signatures (infrared radiation) emitted from objects like humans.

    Specifications:

    • Operating Voltage: DC 4.5V to 20V (commonly used with 5V)
    • Detection Range: Up to 7 meters (adjustable sensitivity may affect range)
    • Detection Angle: Up to 120 degrees (cone-shaped)
    • Output Signal: Digital (HIGH or LOW) indicating motion detection
    • Adjustable Delay: 0.5 seconds to 200 seconds (output remains HIGH after motion is detected)

    Configurability:

    • Trigger Mode Jumper: Selects between repeatable and non-repeatable output behavior:
      • Repeatable: Output stays HIGH as long as motion is detected during the delay.
      • Non-Repeatable: Output goes HIGH only once per detection, then goes LOW after the delay, regardless of continued motion.

    Applications:

    • Security Systems: Basic motion detection for triggering alarms or lights.
    • Automatic Lighting Control: Turning lights on/off upon detecting presence.
    • Power Saving Features: Automatically putting devices in low-power mode when no motion is detected.
    • Interactive Projects: Incorporating motion detection into games, robotics, or other creative applications.

    Considerations:

    • Sensitivity: Adjustable, but may require balancing detection range with false positives from other heat sources (pets, sunlight).
    • Environmental Factors: Performance can be affected by ambient temperature, air flow, or direct sunlight.
    • Limitations: Detects any warm object emitting infrared radiation, not strictly humans. Not ideal for outdoor use due to sensitivity to external factors.

    Additional Notes:

    • The HC-SR501 is a cost-effective sensor, making it a good choice for hobbyist projects.
    • Several online resources and tutorials are available to help you get started using the HC-SR501 with microcontrollers like Arduino or Raspberry Pi.
    • If you require more precise human detection or weatherproof operation, consider exploring alternative sensor technologies like radar or LiDAR.
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