Adafruit
Breadboard-friendly Mini PIR Motion Sensor with 3 Pin Header
A compact passive infrared (PIR) motion sensor that detects movement from people and animals at distances of 2 to 5 metres. Much smaller than standard PIR mo...
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A compact passive infrared (PIR) motion sensor that detects movement from people and animals at distances of 2 to 5 metres. Much smaller than standard PIR modules, this sensor is ideal for unobtrusive projects and plugs directly into a breadboard or perfboard.
Powered from 3–12 V DC via an onboard regulator, the sensor outputs a 3.3 V digital signal that goes high when motion is detected and stays high for approximately 2 seconds, giving your microcontroller plenty of time to read the state.
Key Features
- Compact Form Factor – Breadboard and perfboard friendly with 3-pin header
- Wide Input Voltage – 3–12 V DC with onboard regulator
- 3.3 V Digital Output – High when motion detected, low when idle
- 13.8 mm Diameter Lens – 100° detection spread, 2–5 m range
- 2-Second Hold Time – Signal stays high after detection for easy reading
Pinout
- Pin 1 (−) – Ground
- Pin 2 (O) – Signal output (3.3 V high/low)
- Pin 3 (+) – Power (3–12 V DC)
Ideal For
- Motion-activated lighting and alarms
- Presence detection in IoT projects
- Breadboard prototyping with Arduino or Raspberry Pi
Package Contents
- 1× Mini PIR motion sensor with 3-pin header and lens
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- PIR sensor
- A passive infrared sensor detects changes in heat, usually from a person moving across its view. It matters because PIR sensors are common for lights and alarms, but they can miss people who are present but not moving much.
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Sensors & Input
pir passive infrared proximity motion sensor
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