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Sensors and Detectors

Automatic Light Control Circuit using LDR and LM3909 IC

Last updated on 29 June 2026 by Admin-Lavi Leave a Comment

This Automatic Light Control Circuit using LDR and LM3909 IC is small and smart light sensor circuit which can feel light and dark like magic; also it uses few circuit parts like LDR, LM3909 IC, capacitor and an LED. When dark come, LED turns ON and when light come, LED goes OFF, which is perfect […]

Filed Under: Automation Circuits, LDR Circuits, LED and Lamps, Mini Projects, Sensors and Detectors

LDR Light Sensor Circuit using BC547

Last updated on 29 June 2026 by Admin-Lavi Leave a Comment

To begin with, this LDR Light Sensor Circuit using BC547 works by itself; when it is dark the LED turns ON and when light comes then LED turns OFF. LDR feels the light and controls the LED and there is no need to press any switch. Additionally, this simple and very low-cost circuit works well […]

Filed Under: LDR Circuits, Mini Projects, Sensors and Detectors, Transistor Circuits

Electronic Eye Circuit using IC 4049

Last updated on 29 June 2026 by Admin-Lavi Leave a Comment

This project is for small Electronic Eye Circuit using IC 4049, which can sense darkness or shadow. When light falls on the LDR, the circuit remains OFF and when an object blocks the light, the LED and buzzer turns ON; moreover, this circuit also works like a magic eye and is useful for security systems […]

Filed Under: Alarm Circuits, LDR Circuits, LED and Lamps, Mini Projects, Security and Protection, Sensors and Detectors

IR Burglar Alarm Circuit

Last updated on 29 June 2026 by Admin-Lavi Leave a Comment

Want to protect our home or room from intruders? then this simple IR Burglar Alarm Circuit is our smart security buddy! It uses invisible IR light to sense any movement or break in the beam; the moment someone crosses the path, a loud buzzer alerts us instantly. Moreover, its easy to build, with low cost […]

Filed Under: Alarm Circuits, LED and Lamps, Mini Projects, Security and Protection, Sensors and Detectors

Simple Human Touch Sensor Circuit with Transistor

Last updated on 24 June 2026 by Admin-Lavi Leave a Comment

A human touch can do magic! So this Simple Human Touch Sensor Circuit with Transistor shows how a tiny finger touch can switch ON a light; therefore, no switch, no button just a skin current makes it work. Also, it is a cool and educational mini project for learners. Circuit Working: Parts List: Components Values […]

Filed Under: Automation Circuits, Mini Projects, Sensors and Detectors, Transistor Circuits

Smart Energy Meter Circuit with Arduino UNO

Last updated on 24 June 2026 by Admin-Lavi Leave a Comment

Electric bill increasing day by day; so we need smart way to measure power use. Here is a simple project using Arduino UNO, ACS712 current sensor and 16×2 LCD with I2C and it shows real time current, voltage and power. Also, this project for Smart Energy Meter Circuit with Arduino UNO help to monitor load […]

Filed Under: Arduino Projects, IoT projects, Meters and Testers, Power Supply Circuits, Renewable energy, Sensors and Detectors

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