The PIR (Passive Infrared) motion sensor is a widely used electronic device designed to detect human or animal movement within its sensing range. Here is a product description of the PIR motion sensor:The PIR motion sensor utilizes infrared radiation sensing technology to detect changes in heat signatures caused by moving objects
PIR motion sensor (Passive Infrared motion sensor)
Specification
- Detection Method: Passive Infrared (PIR) technology
- Detection Range: Varies depending on the model, typically around 5 to 12 meters (16 to 40 feet)
- Detection Angle: Usually around 120 to 180 degrees
- Sensitivity Adjustment: Allows fine-tuning of the sensor's sensitivity to motion
- Time Delay Adjustment: Sets the duration the sensor remains active after detecting motion
- Operating Voltage: Usually 3.3V to 5V DC
- Output Type: Digital signal (typically high or low logic level)
- Dimensions: Varies depending on the model
Usage
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Power Supply: Connect the VCC pin of the PIR sensor to the positive supply voltage (3.3V to 5V) of your microcontroller or development board.
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Ground: Connect the GND pin of the PIR sensor to the ground (0V) of your system.
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Output Connection: Connect the OUT or SIGNAL pin of the PIR sensor to a digital input pin of your microcontroller or development board. This pin will receive the digital signal indicating motion detection.
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Sensitivity and Delay Adjustments: If available, adjust the sensitivity and time delay settings on the PIR sensor according to your requirements. These adjustments can typically be made using potentiometers or DIP switches on the sensor module.
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Power-Up Initialization: After connecting the sensor, give it a few seconds to stabilize during power-up before reading the output signal.
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Reading the Output: In your microcontroller code, read the state of the digital input pin connected to the OUT or SIGNAL pin of the PIR sensor. A high or low logic level will indicate the presence or absence of motion, respectively.