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 […]
LDR Circuits
LDR Light Sensor Circuit using BC547
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 […]
Solar Tracker Circuit using LDR and Op-Amp
Solar panels gives more power when they face the sun directly, also manual turning is hard and wastes time; automatic solar tracker moves panel automatically with sun. This Solar Tracker Circuit using LDR and Op-Amp uses simple parts and with no Arduino or microcontroller; its main parts are two LDR sensors, TDA2822 IC, few resistors, […]
Electronic Eye Circuit using IC 4049
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 […]
Sound And Light Metronome Circuit using Transistors
Music needs rhythm and a metronome helps us keep that rhythm perfect; also this small project for Sound And Light Metronome Circuit using Transistors turns light into beat. When light changes then sound speed also change and hence, this project is simple, fun and easy to build. What is Metronome: Metronome is small device that […]
RGB LED Color Control Circuit with LDR and Arduino
Do anyone like lamps that change color with magic? then this project for RGB LED Color Control Circuit with LDR and Arduino makes its real. Using RGB LED and three LDR light sensors, we can create a smart lamp that mix colors based on light around it. Just a simple circuit and with some code, […]