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We are living in the world where everything goes to be automatic from your washing machine to your ceiling fan. Street lights are one of those examples of the automatic world. Automatic street light are those light which needs no manual operation to gets turn ON and turn OFF. Did you ever try to make such kind of street lights that gets turn ON and turns OFF automatically? In this article, we are going to make automatic street light using LDR and 555 timer IC. List of Components   555 Timer IC LDR LED Potentiometer Resistor 1* 1k ohm  Resistor 1* 220 ohm 9V Battery Printed Circuit Board(PCB) Or BreadBoard  Circuit Diagram A very simple circuit diagram of automatic street light is given below.  Automatic Street Light Controller Circuit Principle and Working of Automatic Street Light Controller 555 Timer IC is the main part of the circuit that works as a comparator. All the working of this circuit depends on the working of the 555 timers Ic.To know more about 555 time...

One of the most versatile linear integrated circuit is 555 timer. 555 timer IC was first introduced in early 1970 by  Signetics Corporation.555 timer IC is incredibly low cost and popular timing IC that is used by electronics student, hobbyist for generating timing delay and pulses. Mono stabale and astable multi vibrators is that the most correct example of its application. With the exception of this it's conjointly used for oscillations, waveform generators, analog frequency meters, voltage regulators, digital  probes, tone generation, frequency divider and lots of others.This device is obtainable as 8-pin mini Dual-in-line package(DIP)  or 14 pin Dual-in-line package(DIP) that consist 25 transistor,16 resistors, 2 diode. PIN CONFIGURATION OF 555 TIMER IC 8-Pin DIP 555 Timer IC Pin 1: Ground    This pin is used to measured the all voltages. Pin 2: Trigger    Negative going pulse is applied to this pin whose dc level is greater than 1/3 times ...