MOVING MESSAGE DISPLAY USING ATMEL 89C51
This project is an implementation to provide interfacing and manipulative control of a HD44 compatible liquid crystal display using ATMEL 89C51 microcontroller. The software is able to display ASCII characters on the LCD display and also provides the additional and attractive feature of moving the display string in a unidirectional manner. The 89C51 microcontroller accepts string input from the desktop computer through parallel port interface between 89C51 microcontroller and desktop and display the string passed by the desktop user to the LCD Display.
Table of Contents
Chapter 1 Introduction of Moving message display
Chapter 2 Liquid Crystal Display
2.1 Functional Description
2.1.1 Registers
2.1.2 Busy Flag
2.1.3 Address Counter
2.2 Initializing by Internal Reset Circuit
2.3 Pin Configuration
2.4 Instruction Set
Chapter 3 Introduction to 89C51 Microcontroller
3.1 Memory Organization
3.1.1 General-Purpose RAM
3.1.2 Bit-Addressable RAM
3.1.3 Register Banks
3.1.4 Special Function Registers
3.2 Input/output Ports
3.2.1 Port 0
3.2.2 Port 1
3.2.3 Port 2
3.2.4 Port 3
3.3 Interrupts
3.4 Two 16-bit Timers
3.5 Serial Interface
3.5.1 MAX 232 Serial Interface IC
Chapter 4 Hardware Aspects of MOVING MESSAGE DISPLAY USING ATMEL 89C51
4.1 Serial Port to Microcontroller
4.2 Microcontroller to LCD
4.2.1 Enable Signal Connection
4.2.2 Read/Write Signal Connection
4.2.3 Instruction/Data Signal Connection
4.2.4 Busy Flag
Chapter 5 Programming Aspects of MOVING MESSAGE DISPLAY USING ATMEL 89C51
5.1 Code Overview
LED MOVING MESSAGES displays:-
Light emitting diodes are advan- tageous due to their smaller size, low current consumption and catchy colours they emit.An LED message display sign provides more space to display your led moving message in one line. Brighter and multi-color LED's are available, to give your moving message signs maximum impact. Advertise your daily specials, new products and services. Announce upcoming events at a moment’s notice. Welcome VIPs, guests, or important customers with impact. Promote employee safety, quality and health awareness programs. Within minutes you will be creating dynamic messages using the BetaBrite’s WYSIWYG software and your PC, or by using the infrared remote keyboard (software, RS232 9-pin serial port cables and infrared keyboard included). The display can be fixed on a veroboard of suitable size and connected to ground of a common supply (of 6V to 9V) while the anodes of LEDs are to be connected to emitters of transistors T1 through T7 as shown in the circuit. LED Signs can be controlled from a central location by using a PC running Windows message software and data transmitter with receivers for wireless display network. LED signs deliver high impact advertising. Displays are available in single line scrolling signs, two and three line boards, electronic billboards, true color large video walls and stock tickers.
LCD Message Display :-
This LCD message display can show text with large characters on an 20*4 LCD module. The display can show five characters at a time. Each characters is build from twelve characters of the display module. The text on the display can be read from up to ten meters distance.
The data to build each character is stored in an external 24C32 serial EEPROM which has 4096 bytes of memory. The characters that can be shown on the display are: A to Z and 0 to 9. There are in total 35 characters so we need 35*12 bytes = 420 bytes. The text is also stored in the EEPROM.
It is also possible to show the time and temperature on the display.
References
1. Peter O. “How to Control a HD44780-Based Character-LCD”, 2005
http://ouwehand.net/~peter/lcd/lcd.shtml
2. I. Scott M. “The 8051 Microcontroller”, Printice Hall, New Jersey,1999
3. Wichit S. “RSS232C Level Detector”, 2002
http://chaokhun.kmitl.ac.th/~kswichit/MAX232/MAX232.htm
4. Hantronix Inc.,”Displaying Characters on an LCD Character Module”
http://www.hantronix.com/down/char-mod.pdf
Tags:-
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This project is an implementation to provide interfacing and manipulative control of a HD44 compatible liquid crystal display using ATMEL 89C51 microcontroller. The software is able to display ASCII characters on the LCD display and also provides the additional and attractive feature of moving the display string in a unidirectional manner. The 89C51 microcontroller accepts string input from the desktop computer through parallel port interface between 89C51 microcontroller and desktop and display the string passed by the desktop user to the LCD Display.
Table of Contents
Chapter 1 Introduction of Moving message display
Chapter 2 Liquid Crystal Display
2.1 Functional Description
2.1.1 Registers
2.1.2 Busy Flag
2.1.3 Address Counter
2.2 Initializing by Internal Reset Circuit
2.3 Pin Configuration
2.4 Instruction Set
Chapter 3 Introduction to 89C51 Microcontroller
3.1 Memory Organization
3.1.1 General-Purpose RAM
3.1.2 Bit-Addressable RAM
3.1.3 Register Banks
3.1.4 Special Function Registers
3.2 Input/output Ports
3.2.1 Port 0
3.2.2 Port 1
3.2.3 Port 2
3.2.4 Port 3
3.3 Interrupts
3.4 Two 16-bit Timers
3.5 Serial Interface
3.5.1 MAX 232 Serial Interface IC
Chapter 4 Hardware Aspects of MOVING MESSAGE DISPLAY USING ATMEL 89C51
4.1 Serial Port to Microcontroller
4.2 Microcontroller to LCD
4.2.1 Enable Signal Connection
4.2.2 Read/Write Signal Connection
4.2.3 Instruction/Data Signal Connection
4.2.4 Busy Flag
Chapter 5 Programming Aspects of MOVING MESSAGE DISPLAY USING ATMEL 89C51
5.1 Code Overview
LED MOVING MESSAGES displays:-
Light emitting diodes are advan- tageous due to their smaller size, low current consumption and catchy colours they emit.An LED message display sign provides more space to display your led moving message in one line. Brighter and multi-color LED's are available, to give your moving message signs maximum impact. Advertise your daily specials, new products and services. Announce upcoming events at a moment’s notice. Welcome VIPs, guests, or important customers with impact. Promote employee safety, quality and health awareness programs. Within minutes you will be creating dynamic messages using the BetaBrite’s WYSIWYG software and your PC, or by using the infrared remote keyboard (software, RS232 9-pin serial port cables and infrared keyboard included). The display can be fixed on a veroboard of suitable size and connected to ground of a common supply (of 6V to 9V) while the anodes of LEDs are to be connected to emitters of transistors T1 through T7 as shown in the circuit. LED Signs can be controlled from a central location by using a PC running Windows message software and data transmitter with receivers for wireless display network. LED signs deliver high impact advertising. Displays are available in single line scrolling signs, two and three line boards, electronic billboards, true color large video walls and stock tickers.
LCD Message Display :-
This LCD message display can show text with large characters on an 20*4 LCD module. The display can show five characters at a time. Each characters is build from twelve characters of the display module. The text on the display can be read from up to ten meters distance.
The data to build each character is stored in an external 24C32 serial EEPROM which has 4096 bytes of memory. The characters that can be shown on the display are: A to Z and 0 to 9. There are in total 35 characters so we need 35*12 bytes = 420 bytes. The text is also stored in the EEPROM.
It is also possible to show the time and temperature on the display.
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Previous Page
References
1. Peter O. “How to Control a HD44780-Based Character-LCD”, 2005
http://ouwehand.net/~peter/lcd/lcd.shtml
2. I. Scott M. “The 8051 Microcontroller”, Printice Hall, New Jersey,1999
3. Wichit S. “RSS232C Level Detector”, 2002
http://chaokhun.kmitl.ac.th/~kswichit/MAX232/MAX232.htm
4. Hantronix Inc.,”Displaying Characters on an LCD Character Module”
http://www.hantronix.com/down/char-mod.pdf
Tags:-
moving message display circuit diagram,moving message display using 8051 microcontroller,Scroller Display Board Electronic Moving Display Bank Interest Rate Display. Foreign Exchange Board Production Status Board Bank Token Display Digital Clock moving message display project,circuit for moving message display,moving message display help,content diy moving message display microcontroller based moving message display,A display in which a symbol, representing the vehicle, remains stationary while the map or chart image moves beneath the symbol so that the display moving message software
led moving display,digital display systems,LED DOT MATRIX MOVING DISPLAY - Provides many types of LED Moving Sign Display for your business monitoring & promotion electronic moving,display boardsled message display
car led message display ,message display software,electronic message centers,electronic digital display,display offers,industrial andon display
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