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Television control using sensors. Submitted by: Jayasuthan R. Electronic Engineering Graduate

Project guide: St.joseph’s college of engineering Anna University Mrs. Mercy.D,M.Tech,Ph.D, Asst. Professor, HOD of EEE.

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SYNOPSIS ABSTRACT INTRODUCTION EXISTING SYSTEM PROPOSED SYSTEM BLOCK DIAGRAM WORKING PROGRAM WIRING DIAGRAM RECTIFIER SECTION POWER UNIT SENSOR MICROCONTROLLER RELAY HARDWARE RESULT ADVANTAGE APPLICATION REFERENCE

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Abstract:

The technology used for communication with TV is remote control which is used from the year 1950s.Since we have entered into modern technology,the remote control infused with different functionality.Though it has different functionality,it was not focused on handicapped personnels.Our project aim is to help the handicapped personnels and make them to work indepently. Movement is recognized by sensor and operation was done by microcontroller.

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Introduction:

The first remote to control a television was developed by Zenith Radio Corporation in 1950. The remote was connected to the television by a wire. Years later “Flashmatic” developed a wireless remote in 1955 by Eugene Polley. In our project Remote less operation is possible. If the person wants to control the tv, he/she just need to swap their hands in left or right direction from where they are located.The goal of our project is to help the poor and handicapped persons.

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Existing system:

Using camera the hand gesture controlled tv was launched by Samsung company.The technology used is Image processing system.

But the drawback is the persons who doesn’t have fingers cannot operate independently and cost is expensive.

Samsung tv cost is about 70,000 to 1,00,000.

 

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PROPOSED SYSTEM: Hand movement is recognized by ir

sensors and operation is done by microcontroller.

This project is easier to install in all types of TV’s.

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BLOCK DIAGRAM

HAND GESTURES

IR SENSOR(V+) (C+)

IR SENSOR(V-)(C-)

IR SENSOR(MENU)

MICROCONTROLLER

(ATMEL89C51)

POWERUNIT

Tele Vision

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WORKING: Hand movements was recognized by the two ir

sensors and passes the current to the microcontroller.

The microcontroller will work according to the instruction given. Output pins: Channel + = pin no 3.0 Channel - = pin no 3.1 Volume + = pin no 3.2 Volume - = pin no 3.3 Input pins: Ir sensor (1) = pin no 2.0 Ir sensor (2) = pin no 2.1

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The output pins of the microcontroller was given as a input to this PCB board which is located inside the TV.

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PROGRAM:org 0hmov p2,#0ffhscan: mov p3,#00hjb p2.0,c0jb p2.1,c1mov p3,#00hsjmp scanc0: jb p2.1,v0mov p3,#04hsjmp scan

v0: mov p3,#01hacall d1sjmp scan

c1: jb p2.0,v1mov p3,#08hsjmp scan

v1: mov p3,#02hacall d1sjmp scan

d1: mov TMOD,#010h mov R3,#007hTES: mov TL1,#00h mov TH1,#00h setb TR1T: jnb TF1,T clr TR1 clr TF1 djnz R3,TES RETend

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WIRING DIAGRAM:

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RECTIFICATION:

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A diode bridge is an arrangement of four (or) more diodes in a bridge circuit configuration that provides the same polarity of output for either polarity of input.

The conversion of an alternating current (AC) input into a direct current (DC) output, it is known as a bridge rectifier

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POWER UNIT

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We need 5V & 12V DC source but our three pin socket gives 230V AC so inorder to get reduced voltage the transformer(15v) was used and after the rectification it gives 15v dc .

5v and 12v are taken through 7805 & 7812 regulators.

Components Operating Voltage sensors 5 voltsmicrocontroller 5 volts relay 12 volts

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SENSORS:

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An infrared sensor is an electronic instrument which is used to sense certain characteristics of its surroundings by either emitting and/or detecting infrared radiation. 

It will emit ir rays ,when the object comes the ir gets reflected and received by the receiver in the ir sensor and gives 5v as an output.

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MICROCONTROLLER:

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In our project, we are using ATMEL 89c51 Micro controller. It is a heart of our project. It will used to control the graphical features of Television.

A microcontroller is a computer present in a single integrated circuit which is dedicated to perform any task and execute any specific application. It contains memory, programmable input/output peripherals as well a processor.

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RELAY:

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In our proposed system, we are using five 12V DC relay. This relay circuit unit is connected to the microcontroller through the transistor. Then the output terminal of the relay circuit is connected to the input terminal of the Television.

A relay is an electromagnetic switch operated by a relatively small electric current that can turn on or off a much larger electric current. The heart of a relay is an electromagnet (a coil of wire that becomes a temporary magnet when electricity flows through it).

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Advantages:

Economical Controlling was easier Remote less operation is possible. Easier to install in all types of TV’s.

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APPLICATION

HANDICAPS CAN CONTROL: The persons who doesn’t have fingers can able to operate independently

HOME APPLIANCES CONTROL: It is possible to extend the gesture recognition technology to control the household appliances.

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REFERENCE:

 Zhi-huachen, Junsssg-Tae Kim,Jianning Liang, Jing Zhang and Yu-Bo Yuan1,” Real-Time Hand Gesture Recognition Using Finger Segmentation”, The Scientific World Journal Volume 2014 (2014), Article ID 267872, 9 pages.

[2] William T. Freeman and Michal Roth(December 1994)”, Orientation Histograms for Hand Gesture Recognition”, IEEE Intl. Wkshp. on Automatic Face and Gesture Recognition, Zurich, June, 1995.

[3] Rafiqul Zaman Khan and Noor Adnan Ibraheem,””, International Journal of Artificial Intelligence & Applications (IJAIA), Vol.3, No.4, July 2012.

[4] Rafiqul Zaman Khan and Noor Adnan Ibraheem ,” COMPARATIVE STUDY OF HAND GESTURE RECOGNITION

SYSTEM”, pp. 203–213, 2012.

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Thank you…