In this circuit, we are making a Light Sensor using LDR with Arduino to control a bulb/CFL as per light condition ... Here, we are defining the Pins for Relay, LED and LDR. #define relay 10 int LED = ...

it can be a distinguished as two smaller circuits; a) Voltage divider made using LDR (LDR1) and a Potentiometer (RV1) b) Output (LED D1) in our switching circuit made using a transistor BC547 Q1.

Here, we are designing a simple light activated switch circuit using LDR. It can be used in security applications like when there is darkness on the LDR, it stops lighting. The main principle of this ...

The circuit runs for about 2 years on two AA batteries and could serve as a warning sign or as a "fake" alarm indicator. Supply voltage can be anything from 2.3V up to 6V. The LED-LDR combination acts ...

Looking for a simple circuit to control the light intensity ... we can use the low voltage output from the Arduino ports to control high voltage/current loads -the popular “12V LED strips”- for ...

In the morning the aquarium led light turns off. The aquarium led light circuit uses LDR as light sensor for automatic switching of the circuit. During day time LDR has very low resistance so that IC1 ...

Hi Everyone, This is my 1st Arduino's tutorial video. In this video i am going to show you how to use a LDR or Light Dependent resistor to turn on and off another circuit or a LED. Wouldn’t it be ...