Grove Adjustable PIR Motion Sensor is an easy-to-use Passive Infrared motion sensor, which can detect infrared object motion up to 3 meters.
What is a PIR Sensor?
A passive infrared sensor is an electronic sensor that measures infrared light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. PIR sensors are commonly used in security alarms and automatic lighting applications.
What does a PIR sensor detect?
PIR sensors are also known as PID or Passive Infrared Detectors. Thus, the PIR sensor can detect infrared radiation that is emitted by particles.
How does PIR Sensor work?
The PIR Sensor has 2 slots, and the slots are made of sensitive material. When the sensor is inactive, then the two slots will sense the same amount of IR. The ambient amount radiates from the outdoors, walls or room, etc.
When a human body or any animal passes by, it intercepts the first slot of the PIR sensor. This causes a positive differential change between the two bisects. But when the body leaves the sensing area, the sensor generates a negative differential change between the two bisects.
Highlighted Features
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Easy to use: Grove-compatible interface and supports both Arduino and Raspberry Pi platforms
- Flexible detecting: detect infrared object motion up to 3 m
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Small-design: 20mm x 40mm
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Wide application: it is commonly found in appliances and gadgets due to its low-cost, low-power,easy-to-use, and long-life cycle.
Applications
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PIR motion detection
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Intruder detection
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Occupancy detection
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Motion sensor lights
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Security system
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Automatic control, etc.
Hardware Overview
Figure 1: Device Connection Points
Figure 2: Device Schematics