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PIR Motion Sensor Module – SR501

1 Review
in stock

QUICK OVERVIEW

The PIR Motion Sensor Module – SR501 is a device used to detect motion in a room or area. It operates by using a passive infrared sensor to detect changes in the infrared radiation levels in its field of view, indicating the presence of a moving object. The module is small and compact, making it suitable for a range of applications, such as home automation, security systems, and robotics. The module outputs a digital signal, making it easy to interface with microcontrollers and other electronics.

Price: $6.48 (GST inclusive)

14 in stock (can be backordered)

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SKU: Sensor-Mod-PIR Categories: Motion Sensors, Sensors Tags: Module, Motion, PIR, Sensor, SR501
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  • Description
  • Reviews (1)

Description

The PIR Motion Sensor Module – SR501 is a device used to detect motion in a room or area. It operates by using a passive infrared sensor to detect changes in the infrared radiation levels in its field of view, indicating the presence of a moving object. The module is small and compact, making it suitable for a range of applications, such as home automation, security systems, and robotics. The module outputs a digital signal, making it easy to interface with microcontrollers and other electronics.

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
  • Advanced Arduino Training

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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