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Joined: 07-Jul-2011
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Quote surajhit Replybullet Topic: project on automatic street light controller
    Posted: 07-Jul-2011 at 1:04am
sir i am a ece 3rd year student and want to do a project with topic "solar automatic traffic and street light controller".kindly help and suggest me what should be my initial steps.
plz reply as soon as possible.

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Quote skumar Replybullet Posted: 08-Jul-2011 at 5:41pm

You could get some ideas from these projects on automatic street light control.

Automatic Street Light Control System with Block Diagrams

Automatic Street Light Circuit and Components

Centralized Street Lighting Control and Monitoring Project - http://dmdeng.com/pdf/Prince_George_Report.pdf

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Quote Stranger Replybullet Posted: 08-Jul-2011 at 6:14pm
The Auto Street Light using LDR circuit diagram is that of a street light that automatically switches ON when the night falls and turns OFF when the sun rises. In fact you can this circuit for implementing any type of automatic night light.

The circuit uses an LDR to sense the light .When there is light the resistance of LDR will be low.So the voltage drop across POT R2 will be high.This keeps the transistor Q1 ON.The collector of Q1(BC107) is coupled to base of Q2(SL100).So Q2 will be OFF and so do the relay.The bulb will remain OFF.

When night falls the resistance of LDR increases to make the voltage across the POT R2 to decrease below 0.6V.This makes transistor Q1 OFF which in turn makes Q2 ON. The relay will be energized and the bulb will glow.

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Quote siva Replybullet Posted: 28-Jul-2012 at 7:47pm
Automatic Street Light Control System Project
Automatic Street Light Control System is a simple and powerful concept, which uses transistor as a switch to switch ON and OFF the street light automatically. By using this system manual works are removed. It automatically switches ON lights when the sunlight goes below the visible region of our eyes. It automatically switches OFF lights under illumination by sunlight. This is done by a sensor called Light Dependant Resistor (LDR) which senses the light actually like our eyes.

Download Project on Automatic Street Light Control System
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