49586128 moving message display on lcd

8/22/2019 49586128 Moving Message Display on Lcd

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Mini Project 2010 Moving Message Display on LCD

Central India Institute of Technology Dept. of Electronics & communication Engineering

CENTRAL INDIA INSTITUTE OF

ENGINEERING

INDORE

MINOR PROJECT REPORT

ON

MOVING MESSAGE DISPLAY ON LCD

Submitted in accordance with the curriculum requirements for

Sixth semester of the degree course in

BACHELOR OF ENGINEERING

In the branch of

ELECTRONICS AND COMMUNICATION ENGINEERING

of

RAJIV GANDHI TECHNICAL UNIVERSITY

YEAR 2010

Under the guidance of :- Submitted by

MR. Gurvinder Singh (H.O.D) SANDIP SHAW

MR. Dilip Mujalte AKHILESH TIWARY

MANPREET SINGH KHANUJA


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CONTENT

1.AIM2.ABSTRACT...3.COM ON NT LIST..4.CIRCUIT DIAGRAM5.WORKING


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Mi' i Proj( )

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C(ntral India Instit5 t

(of Technology Dept. of Electronics & communication Engineering

Ai :-

T desi movi message display usi g LCD.

Abstract:-

Amovi g message display usi g LCDis a modernelectronic notice board in which messages to displayed are

rotate continuously i.e. one message follows the next and after

the last message the first willbe displayed again. It is very

useful these days as it is used in public place generally to

display important information for example on railway station,

train running information or ticket availability status are

displayed on these board.

Component list:-

y AT89C51 - ICROCONTROLLERy JHD162A-LCDDISPLAYy 10K-RESISTORARRAYy 3.579-CRYSTALOSCILLATORy 22pf-CAPACITOR(2-PIECES)y 5V-POWERSUPPLY


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CIRCUIT DIAGRAM:-


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WORKING:-

One can send data as 8-bit orin pair oftwo 4-bit

nibbles.To display any character on LCD micro controller has to

send its ASCII value to the data bus of LCD.For e.g. to display

'AB' microcontroller has to send two hex bytes 41h and 42h

respectively.LCD display used here is having 16x2 size. It means 2

lines each with 16 character.

To display moving message we will have to

program the Microcontrollerin this way.

Algorithm to send data to LCD:

1.Make R/Wlow

2.Make RS=0 ;if data byte is command

RS=1 ;if data byte is data (ASCII value)

3.Place data byte on data register

4.Pulse E (HIGH to LOW)

5.Repeatthe steps to send another data byte

LCD Initialization:

This is the pit fall for beginners.Properworking of LCD depend on

the how the LCD is initialized. We have to send few command

bytes to initialize the lcd. Simple steps to initialize the LCD

1.Specify function set:

Send 38H for 8-bit,double line and 5x7 dot character format.


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2.Display On-Off control:

Send 0FH for display and blink cursor on.

3.Entry mode set:

Send 06H

for cursorin increment position and shiftis invisible.4.Clear display:

Send 01Hto clear display and return cursorto home position.


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49586128 moving message display on lcd

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