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The HC-SR501 PIR Motion Sensor Module is a highly reliable, low-power infrared sensor designed for automatic motion detection. Operating between DC 4.5V and 20V, it features adjustable sensitivity and time delay settings, making it perfect for Arduino projects, smart home automation, and DIY security systems.
The HC-SR501 Pyroelectric Infrared PIR Motion Sensor Module is an automated control solution based on infrared technology. Featuring high sensitivity, strong reliability, and low-voltage operating mode, this module is widely used in various auto-sensing electrical equipment, especially for battery-powered automatic control products.
Whether you are designing an automatic hallway light, an anti-theft security system, or an interactive DIY robotics project, the HC-SR501 provides a stable and seamless way to detect human or animal movement by capturing infrared body heat.
Operating Voltage: DC 4.5V to 20V
Quiescent Current: < 50 µA (Ultra-low power consumption, making it ideal for battery-operated devices)
Digital Output Level: High 3.3V / Low 0V (TTL logic)
Detection Distance: Adjustable from 3 meters to 7 meters via the onboard sensitivity potentiometer
Delay Time: Adjustable from 5 seconds to 300 seconds via the onboard time-delay potentiometer
Sensing Angle: < 120° cone angle
Trigger Modes: L (Non-repeatable trigger) and H (Repeatable trigger, default setting)
Block Time: 2.5 seconds (Default time after an output during which the sensor will not detect motion)
Operating Temperature: -15°C to +70°C
Lens Type: Compact Fresnel lens (23mm diameter)
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