LDR Circuits

This article for Simple Electronic Candle Circuit using LDR is fun and easy project to make fake candle with LED. It uses LDR to make LED flicker like real flame and turns ON when its dark. LDR controls the LED. In bright light the LDR has high resistance so LED stays OFF. And when its […]

LED and LDR are used to make this easy and Simple Flasher Circuit. LDR changes resistance when light changes and this control LED blink. There is no need for big chips or transistors but still the LED blink happens. It uses simple parts like resistor, capacitor and special light sensor called LDR. Circuit Working: Parts […]

This Automatic Night Lamp Circuit using IC 555 works like smart switch for night light. It have one special light sensor called LDR to check how much light is outside. When night come and outside become dark the circuit turns ON the lamp by itself. Then when morning comes and light comes back it turn […]

This Backyard Lamp Circuit using IC CD4060 works like smart switch for outside light. It uses one special sensor, LDR to know if it is day or night. When night comes circuit turn ON the backyard lamp by itself. Then morning comes with light again it turns OFF the lamp. It do this with a […]

Simple Day Night Activated Switch Circuit using a Triac and LDR show how to make circuit which turns ON and OFF things by seeing outside light. We only need one light sensor (LDR), one resistor, one capacitor and one special switch called Triac. This circuit are used many time for alarm it turns ON light […]