Projects

AutomaTic LighT ConTroller

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Project Owner : Sridhar43
Created Date : Fri, 24/06/2011 - 19:41
Project Description :

              Introduction to ALC (IC 7806)  :     

  Voltage regulator ICs(76xx series)provided a steady o/p vt,as against a widely fluctuating input supply , When the common terminal  is grounded. Any vt about zero volt (grounded) connected in the common terminal is added to the o/p voltage . That means the increase in the common terminal vt is reflected at the o/p . On the other hand ,if the common terminal is disconnected from the gnd ,the full i/p voltage is available at the o/p.

                       Description:

      This characteristic is utilised in the present ckt .When the common terminal is connected to the gnd,the regulator o/p is eqlnt to the rated voltage,and as soon as the terminal is diaconnected from the gnd,the o/p increases up to the i/p vt. The common terminal is controlled by a transistor ,Which works as a switch on the terminal .For automatic control of light-dependent resistor is connected to the base of the transistor. In this way,the voltage regulator is able to operate a light bulb automatically as per the ambient light.

Requirements:

Power supply = 230 v AC (50 Hz)

Transformer delivery = 12 V & 250 mA

IC = 7806

Transistor(s) & Diode(s) = as per the circuit development (designer)

LDR =1

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