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Sensors and Detectors

Smart Street Light Control Circuit

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

Light ON at night and light OFF in day all automatic! A single LDR and a BC547 transistor perform all these functions. This Smart Street Light Control Circuit is a easy and simple way to save energy and also there is no manual effort and no energy waste. Circuit Working: Parts List: Components Values Quantity […]

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

Obstacle Detection Circuit with 555 Timer and Ultrasonic Sensor

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

Want to build a smart obstacle detector without using Arduino? then this simple project uses a 555 timer and an ultrasonic sensor to sense distance and control a DC motor automatically. Also, it is easy to make with low-cost and perfect for beginners in electronics; therefore, this Obstacle Detection Circuit with 555 Timer and Ultrasonic […]

Filed Under: 555 Timer Projects, Automation Circuits, Hobby Circuits, Sensors and Detectors, Timer Circuits

Temperature Controlled LED Circuit

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

This small Temperature Controlled LED Circuit can feel the heat! When we place near warm thing, it sense temperature and LED glow and it work very simple using one diode and one transistor only. No microcontroller, no sensor IC, just few parts and also we can build it easy at home and see how heat […]

Filed Under: Heater and Temperature Controllers, LED and Lamps, Mini Projects, Sensors and Detectors

LDR Based Dark Sensor Circuit

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

This small LDR Based Dark Sensor Circuit is very smart, as it can see light and dark using LDR. When there is light, everything stay quiet and when it becomes dark then LED start to glow and buzzer makes sound; also there is no need to touch anything it works by itself. In addition, it […]

Filed Under: LDR Circuits, LED and Lamps, 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

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