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Photodiode, Phototransistor – Working and Application Circuits

Last Updated on October 5, 2019 by Swagatam 22 Comments

Photodiodes and phototransistors are semiconductor devices which have their p-n semiconductor junction exposed to light through a transparent cover, so that external light can react and force an electrical conduction […]

Filed Under: Electronic Devices and Circuit Theory, Electronics Tutorial, Infrared (IR), Mini Projects, Security and Alarm, Sensors and Detectors

9 Useful LDR Circuits Explained

Last Updated on June 7, 2022 by Swagatam 35 Comments

In this post we explore 9 LDR circuit projects that uses LDR light sensor to trigger a load ON/OFF through a relay. These circuits are mostly triggered by the absence […]



Filed Under: Datasheets, Mini Projects, Security and Alarm, Sensors and Detectors

Types of Arduino Boards with Specifications

Last Updated on December 30, 2019 by Swagatam 18 Comments

In this post we present a list of around 20 popular Arduino boards that are used by engineering students and professionals for their specific application needs. The types of Arduino […]

Filed Under: Arduino Engineering Projects

Videos – Circuit Test Results

 3:22 How to Test a Mosfet with a Multimeter 6 views 6 hours ago  0:48 Simple Arduino Siren Circuit 6 views 1 day ago  1:25 Simple Laser Remote Control Circuit […]

50 Best Arduino Projects for Final Year Engineering Students

Last Updated on July 3, 2019 by Swagatam

engineering students projects electronic

In this post we sort out a list of most popular, 50 hand-picked and best engineering circuit Arduino projects specially created for all aspiring engineers for their final year project […]

Filed Under: Arduino Engineering Projects

5 Simple Motion Detector Circuits using PIR

Last Updated on July 15, 2022 by Swagatam 119 Comments

PIR with delay ON alarm

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



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