DFRobot
Gravity: Arduino PIR (Motion) Sensor
A passive infrared (PIR) motion sensor from DFRobot's Gravity series. It detects infrared radiation from people and animals in motion and outputs a digital H...
A passive infrared (PIR) motion sensor from DFRobot's Gravity series. It detects infrared radiation from people and animals in motion and outputs a digital HIGH signal when movement is detected — ideal for security systems, occupancy sensing, and automated lighting projects.
The sensor operates at 3.3–5 V and uses DFRobot's Gravity 3-pin interface for plug-and-play connection to Arduino, Raspberry Pi, and other microcontrollers. An onboard LED lights up when motion is detected.
Key Features
- PIR Motion Detection – Detects human and animal movement via infrared
- 7 m Detection Range – 100° detection angle
- 3.3–5 V Operation – Compatible with both 3.3 V and 5 V logic
- Gravity Interface – PH2.0 3-pin connector for plug-and-play wiring
- Low Power – 15 µA working current
- LED Indicator – Lights when output is HIGH (motion detected)
Specifications
- Input Voltage: 3.3–5 V (6 V max)
- Working Current: 15 µA
- Output: Digital (HIGH 3 V / LOW 0 V)
- Output Delay: ~2.3–3 seconds (HIGH)
- Detection Angle: 100°
- Detection Distance: 7 m
- Pin Limit Current: 100 mA
- Connector: PH2.0 3-pin (Gravity)
- Module Size: 30 × 22 mm
- Operating Temperature: −20 to +85 °C
Ideal For
- Security and intrusion detection systems
- Occupancy-based automation (lighting, HVAC)
- Interactive installations and exhibits
Package Contents
- 1× Gravity Digital PIR Motion Sensor
- 1× Gravity Digital Cable
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- Motion detection
- A camera feature that checks the image for changes that suggest something has moved. It matters because your project can use movement as a trigger instead of constantly saving or processing every frame.
Find this product in
Brands
Sensors & Input
Supplier page — dfrobot.com
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Related Tutorials
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