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PLCC control of Devices

 

 

Objective:-

 

Data Communication Using Optical fiber

DTMF Technology

 

 

 

Introduction:

In this project we will control the devices using powerline transmission medium. We will send controlling data through powerline from transmitter. On receiver  end we will control the devices.

 

Data commmuniction using power line is important project according to todayís increasing rush of power line and data lines. In this project we will transmit data using earth wire. Earthing very important  for this project. It will also help to control the the various devices with power supply circuit.    In this project we  will transmit data using DTMF encoder IC  91214 . IC 91214 is frequency generators . actually we will send particular frequency to decode it at reciver. We wll amplify the signal after DTMF technology play the key role .In amplifiers first of all we will use voltage amplifier and then power amplifier . there will be IC741 as voltage amplifier circuit. And then transistorized  power amplifier circuit. In receiver side there will be amplifiers then there will be DTMF decoder driver IC 8870. we will reamplify the signal because of the week signal detected  at receiver. Ic 8870 has pin no2, 3 as input pins . output of decoder will be Binary coded decimal. There will be four outputs will be input to Microcontroller IC 89c051 . output of IC will be on LCD display. In this way we will transmit data . DTMF frequency lie with in voice frequency range.

 DTMF is Dual  tone Multi frequency. Dtmf frequency wave is very equal to sine wave like

 

 

In spite of sending pulses we  will send DTMF signal. This technology is use in telephones. Thatís why its very important and reliable in Data communication. Morever its frequency range lie with in voice frequency range.

 

 

 

Applications:

 

Already Implemented In Bhakhra Nangal Dam.

DTMF signal Transmission.

Controlling devices .

Voice and Data transmission  using DTMF technology.

 

Uses:

Easy to implement

Reliable,

Low cost,

Components easily available in market.

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Planning

 

STEPS

TIME

RESPONSIBILTY

PROJECTS SELECTION

 

 

CIRCUIT AND THEORY ARRANGEMENT

 

 

CHECKING AVAILABILITY OF COMPONENTS

 

 

TESTING CIRCUIT

 

 

PCB DESIGN

 

 

COMPONENT INSERTION AND SOLDERING

 

 

TESTING

 

 

REWORK  OR TROOUBLE SHOOTING

 

 

 

Bibliography:

 

www.google.com

 

www.yahoosearch.com

 

http://en.wikipedia.org/wiki/Power_line_communication