Mini Project 2010 Moving Message Display on LCD

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

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

Mini Project 2010 Moving Message Display on LCD

CONTENTS

1. AIM……………………………………2. ABSTRACT…………………………...3. COMPONENT LIST…………………..4. CIRCUIT DIAGRAM…………………5. WORKING……………………………

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

Mini Project 2010 Moving Message Display on LCD

Aim:-

To design moving message display using LCD.

Abstract:-

A moving message display using LCD is a modern electronic notice board in which messages to displayed are rotate continuously i.e. one message follows the next and after the last message the first will be 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:-

AT89C51 -MICROCONTROLLER JHD162A -LCD DISPLAY 10K-RESISTOR ARRAY 3.579-CRYSTAL OSCILLATOR 22pf-CAPACITOR(2-PIECES) 5V-POWER SUPPLY

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

Mini Project 2010 Moving Message Display on LCD

CIRCUIT DIAGRAM:-

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

Mini Project 2010 Moving Message Display on LCD

WORKING:-

One can send data as 8-bit or in pair of two 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 Microcontroller in this way.

Algorithm to send data to LCD:

1.Make R/W low

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.Repeat the steps to send another data byte

LCD Initialization:

This is the pit fall for beginners.Proper working 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.

2.Display On-Off control:

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

Mini Project 2010 Moving Message Display on LCD

Send 0FH for display and blink cursor on.

3.Entry mode set:

Send 06H for cursor in increment position and shift is invisible.

4. Clear display:

Send 01H to clear display and return cursor to home position.

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

Mini Project 2010 Moving Message Display on LCD

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