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Ultrasonic Motion Detector Circuit

Last Updated on June 12, 2022 by Swagatam 20 Comments

This ultrasonic motion detector circuit project picks up movement of any object including human beings from a distance of 4 to 7 meters away. As soon as the motion is […]

Filed Under: Sensors and Detectors, Ultrasonic Projects

How to Use Diodes, Transistors, ICs as Temperature Sensors

Last Updated on June 9, 2022 by Swagatam 10 Comments

Normally we find thermistors being used as the sensor for detecting and monitoring temperatures in electronic circuits. However, ordinary semiconductor components like transistors and diodes actually work better than thermitors […]



Filed Under: How to Articles, Sensors and Detectors

Motion Detector Circuit using Doppler Effect

Last Updated on October 21, 2020 by Swagatam 4 Comments

The motion sensor circuit explained in the article works by using doppler shift principle, in which the moving target is detected through the continuously varying frequency, reflected from the moving […]

Filed Under: Sensors and Detectors

Precision Current Sensing and Monitoring Circuit using IC NCS21xR

Last Updated on October 18, 2020 by Swagatam 12 Comments

If you are looking for current shunt monitors or current sense amplifiers then you have landed at the right page. Current shunt monitor is an instrumentation amplifier which senses the […]

Filed Under: Sensors and Detectors

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

Photodiode, Phototransistor – Working and Application Circuits

Last Updated on October 5, 2019 by Swagatam 16 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

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