PIR Motion Sensor Module (HC-SR501)

The PIR Motion Sensor Module detects motion by measuring changes in infrared radiation emitted by objects such as humans and animals. When a person enters the sensor’s detection range, the infrared level changes and the module generates a digital output signal. The module includes adjustable sensitivity and delay time controls, allowing users to configure the detection distance and output duration. Because of its reliability and low power consumption, this sensor is commonly used in security alarms, automatic lighting systems, smart home automation, and motion-activated devices. Key Features Detects human motion using infrared radiation Adjustable detection distance and delay time Low power consumption Digital output signal Compact and easy to interface Compatible with Arduino and other microcontrollers Technical Specifications Parameter Value Operating Voltage 5V – 12V Detection Range Up to 7 meters Detection Angle ~120° Output Type Digital Trigger Mode Repeatable / Non-repeatable Pin Configuration Pin Description VCC Power Supply (5V–12V) OUT Digital Output GND Ground