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In the kit Automatic Light Controller using 7806 needs no manual operation for switching ON and OFF when there is need of light. It detects itself whether there is need for light or not. When darkness rises to a certain value then automatically light is switched ON and when there is other source of light i.e. day time, the light gets OFF. The sensitiveness of the light can be adjusted. The circuit thus saves the electrical power as well as man power. The principle involves the detection of the intensity of light with help of LDR which changes the value of resistance across it on the basis of light. This principle is used in various applications.Automatic street light system is very common nowadays as it provides intelligent street lighting mechanism. It provides light automatically during night without any human interference. These energy saving street lights make use of incandescent lamps instead of LEDs.So here I will teach you how to make an electronic circuit for street light automation. The heart of this circuit is a LDR (Light Depended Resistor)