PIR is the acronym for Passive Infra Red. The first circuit uses an op amp, while the second design works with a single transistor and relay for detecting the IR radiation from a moving human body and activating the a relay activated alarm. How to apply a PIR to detect an object in industrial applications.How to use a PIR to switch ON lights when a human presence is detected.How to use a PIR module as a Security Burglar Alarm Circuit.How to use a PIR sensor device to Detect human body infrared.We also discuss the pinout details of the standard passive infrared (PIR) sensor RE200B.
The post discuses 4 simple motion detector circuits using op amp and transistor.
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