HC-SR501 Infrared Human Motion Sensor
KSh 200.00
In stock
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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