For instance, when the LDR is in darkness, then it can be used to turn ON a light or to turn OFF a light when it is in the light. These resistors have a variety of functions and resistance. These resistors are often used in many circuits where it is required to sense the presence of light. When the light falls on the resistor, then the resistance changes. It is a one type of resistor whose resistance varies depending on the amount of light falling on its surface. What is a Light Dependent Resistor?Īn LDR or light dependent resistor is also known as photo resistor, photocell, photoconductor. This article discusses in brief about what is a light dependent resistor, how to make a light dependent resistor circuit and its applications. Hence, we can utilize the light sensor circuit for automatic switch OFF the loads based on daylight’s intensity by employing a light sensor. This is not only risky, however additionally it leads to wastage of power with the negligence of personnel or uncommon circumstances in controlling these electrical appliances ON and OFF.
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