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3 Accurate Infrared Intruder Alarm Circuits using Photodiodes

Last Updated on January 19, 2025 by Swagatam 31 Comments

IR transmitter

In this post I have explained 3 simple yet accurate infrared intruder alarm circuits using an infrared transmitter and an infrared receiver module. The transmitter and the receiver photo diodes used in the two modules are aligned in line at a distance of around 2 meters within the restricted area. When a burglar tries to […]

Filed Under: Security and Alarm Tagged With: Accurate, Alarm, Circuits, Infrared, Intruder, Photodiodes

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