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You are here: Home / Archives for PIR (Passive Infrared)

How Contactless Infrared Thermometers Work – How to Make One

Last Updated on February 26, 2022 by Swagatam 4 Comments

In this post we will learn the basic working concept of thermal scanners or contactless IR thermometers, and also learn how to make a practical DIY prototype of the unit […]

Filed Under: Health Related, How to Articles, Infrared (IR), PIR (Passive Infrared), Sensors and Detectors

5 Simple Motion Detector Circuits using PIR

Last Updated on July 15, 2022 by Swagatam 103 Comments

A PIR motion sensor alarm is a device which detects the infrared radiation from a moving human body and triggers an an audible alarm. The post discuses 5 simple motion […]



Filed Under: Infrared (IR), PIR (Passive Infrared), Sensors and Detectors

PIR Sensor Datasheet, Pinout Specifications, Working

Last Updated on October 2, 2021 by Swagatam 38 Comments

PIR Sensor internal composition, layout and configuration

In this post we are going to explore the datasheet of PIR or Pyroelectric Infrared Radial Sensor HC-SR501. We will understand for what purpose PIR sensor is used? Its basic […]

Filed Under: Datasheets, Infrared (IR), PIR (Passive Infrared), Security and Alarm

PIR Solar Home Lighting Circuit

Last Updated on July 3, 2019 by Swagatam 23 Comments

simple PIR based solar lamp circuit

The post explains a simple circuit using Passive Infrared or PIR for making an automatic solar LED lamp which can be used for illuminating your home automatically at sunset, and […]

Filed Under: Infrared (IR), Mini Projects, PIR (Passive Infrared), Solar Controllers

PIR Triggered Message Player Circuit

Last Updated on July 6, 2019 by Swagatam Leave a Comment

In this post we diagnose a PIR activated message player circuit, which was sent by Mr. Norman Kelley one of the dedicated followers of this blog for improvements. Let’s learn […]

Filed Under: 4017 IC Circuits, Home Electrical Circuits, PIR (Passive Infrared)

Detecting Static Human with PIR

Last Updated on April 1, 2021 by Swagatam 20 Comments

PIR chopper for detecting stationery human presence

The post explains a method which can be probably used for enhancing a passive infrared sensor ability to detect even a static or stationery human presence. This feature is normally […]

Filed Under: Infrared (IR), PIR (Passive Infrared), Security and Alarm

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