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 […]
LDR Circuits
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Simple Light Operated Relay Circuit
Simple Light Operated Relay Circuit work like small auto light switch. It uses special sensor like LDR or photo diode which work like small eye. When light appears sensor gives signal to the circuit and then circuit turn the relay ON or OFF This help for turning outside light at night or start sprinkler type […]
Automatic Night Lamp Circuit using IC 555
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 […]
Backyard Lamp Circuit using IC CD4060
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
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 […]
Flashlight Activated Remote Control Circuit
This tutorial show how to make a Flashlight Activated Remote Control Circuit. We can turn it ON using flashlight. It uses light sensor and this sensor is made with one transistor and special LDR that sees flashlight. This article tell step-by-step guide how to build flashlight remote circuit and how to use it. What is […]