AUTOMATIC LIGHT SWITCHING SYSTEM
This is the basic project that switches the led on off on the basis of their requirement. When there is dark in the room, the led switches on automatically, as soon as the room is bright the led automatically switches off. This project works with the help of LDR sensor that sense the sensitivity of light. ABOUT LDR A Light Dependent Resistor (LDR) is also called a photo resistor or a cadmium sulphide (Cd S) cell. It is also called a photoconductor. It is a photocell that works on the principle of photoconductivity. The passive components are basically a resistor whose resistance value decreases when the intensity of light decreases. This device is mostly used in light varying sensor circuit, and dark and light activated switching circuits. Some of its applications include: · Camera light meters · Street lights · Clock radios · ...
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