This LDR Light Sensor Circuit using BC547 works by itself. When it is dark the LED turns ON. When light comes then LED turns OFF. LDR feels the light and controls the LED. No need to press any switch. Circuit is simple and is with very low cost. It is good for small night lamp […]
LDR Circuits
Solar Tracker Circuit using LDR and Op-Amp
Solar panels gives more power when they face the sun directly. 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. Main parts are two LDR sensors, TDA2822 IC, few resistors, solar panel […]
Electronic Eye Circuit using IC 4049
This project is for small Electronic Eye Circuit using IC 4049. It can sense darkness or shadow. When light falls on LDR the circuit stays OFF. When light is blocked then LED and buzzer turns ON. It is like a magic eye circuit used for security or door alarms. Circuit Working: Parts List: Component Value […]
RGB LED Color Control Circuit with LDR and Arduino
Do anyone like lamps that change color with magic? 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, we […]
LDR Light Sensor Circuit with Arduino
This project is for smart LDR Light Sensor Circuit with Arduino. It can feel light like human eye. When dark come, it turn ON lamp by itself. When light come, it turn OFF lamp automatic. No need to press any switch. It save time and save power. It is small, simple and very low cost […]
LDR Based Aircraft Warning Signal Light Circuit
In tall buildings, towers or high structures it is important to show warning light for aircraft safety. Normally a red 230V LED bulb is used as warning lamp. This LDR Based Aircraft Warning Signal Light Circuit automatically switches ON the bulb in night and switch OFF in day. It uses LDR sensor, relay and small […]