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PIR Motion Sensor Module – SR501

1 Review
in stock

QUICK OVERVIEW

The output of PIR motion detection sensor can be connected directly to one of the Arduino (or any microcontroller) digital pins. If any motion is detected by the sensor, this pin value will be set to “1”. The two potentiometers on the board allow you to adjust the sensitivity and delay time after detecting a movement.

The PIR Motion sensor module is an automatic control module based on infrared technology. It adopts LHI788 probe, which has high sensitivity, high reliability, low voltage working mode and low power consumption.

Price: $6.48 (GST inclusive)

17 in stock (can be backordered)

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SKU: PIR-SR501-MODULE Categories: Motion Sensors, Sensors Tag: Sensors
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  • Description
  • Reviews (1)

Description

Passive Infra-Red (PIR) sensor is a motion detector sensor by measures changes in the infrared levels emitted by surrounding objects. It gives a HIGH signal at the I/O pin when motion is detected. Usually used as a security device in a monitored area (such as a room or hall) to detect the appearance of a human being.

Features:

  • Passive infrared sensor (PIR sensor)
  • Operating voltage: DC 4.5V ~ 5V
  • Quiescent Current: <65uA
  • Output: High level 3.3 V; Low level 0V
  • Delay time: 5-200S(adjustable)
  • Trigger mode setting: L=Not repeated(default); H=Repeated
  • Block time 2.5S(default)
  • Board Dimensions 32mm x 24mm
  • Sensing Angle: < 120° cone angle
  • Operation Temp. -15 ~ +70 degrees

How the PIR Sensor Work

  • The PIR sensor itself has two slots in it, each slot is made of a special material that is sensitive to IR.
  • When the sensor is idle, both slots detect the same amount of IR, the ambient amount radiated from the room or walls or outdoors.
  • When a warm body like a human or animal passes by, it first intercepts one half of the PIR sensor, which causes a positive differential change between the two halves. When the warm body leaves the sensing area, the reverse happens, whereby the sensor generates a negative differential change. These change pulses are what is detected
  • The IR sensor itself is housed in a hermetically sealed metal can to improve noise immunity.
    There is a window made of IR-transmissive material (typically coated silicon since that is very easy to come by) that protects the sensing element. Behind the window are the two balanced sensors

Tutorials

Resources

  • User Guide
  • PIR Motion Sensor Tutorial
  • Using PIR Motion Sensor with Arduino 

Recommended Workshops

  • WSQ – Internet of Things (IoT) Fundamental for Beginners
  • NICF – Embedded System Integration with Arduino Microcontroller

1 review for PIR Motion Sensor Module – SR501

  1. Rated 5 out of 5

    Robo Admin T – January 27, 2023

    Cheap and good quality product

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