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Basic Level Skills: Not specified 6/29/2012 (Fri Jun 29 2012, 06:01 PM)

Author

Nasim Majoka

Author website

www.8051projects.net

Description

Here is another feature packed and knowledge rich project from our friend Majoka. He is savior for many students.

We already have his previous Dot Matrix display using 8051 (http://www.8051projects.net/download-d230-scrolling-

dot-matrix-led-display-using-8051.html). This project is an update to the same project with some additional features

and lot of study material.

Here is what you will find in the download package:

1. Dot Matix Display code in C

2. Dot Matrix Display code in Assembly

3. VB6.0 based GUI software with code

4. Schematics (both old and new design)

Here is a big list of change from the previous version:

On Hardware side:

ULN2803 array is used to sink the current of Leds in last version decoder was used to sink the current so the

display was not so bright this time it is comparatively more bright at 5 volt.

74HCT4514 decoder is used instead of 74ls154 both has inverted output to each other.

On Firmware (controller coding) side:

Keil4 is used for c coding

The firmware was in asm language in last project. In this updated version that is converted into c language as c

is more professional and easy Language.

Scrolling speed can be changed and after changing it is saved in the EEPROM.

Full Duplex Serial Communication at 9600 baud rate.

Maximum 200 Character can be sent to Display.

On Software (GUI) side:

Visual Basic 6 is used to make this GUI.

Serial Port API is used that make it compatible to work on window xp, vista and window 7.

Auto Detect number of Serial Ports in PC.

Scrolling speed Slider bar is added to change the speed of scrolling message.

Software can be Hide in system tray

and many more..... Complete list with discription can be found in download package.

Here is a working video of this project

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Scrolling Dot Matrix LED Display using 8051 (updat...

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Scrolling Dot Matrix LED Display using 8051 (updated)

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cutemanikutti (http://www.8051projects.net/user39354.html) 15 Ju l : 00:20

wil u able to mail me the simulation of this project in Proteus please help me.

Thank u

Anonymous 19 Ju l : 01:41

can we increase the sizes of this matrix to 8 in place of 6 what type of change are to be made in code?

cutemanikutti (http://www.8051projects.net/user39354.html) 25 Ju l : 00:47

reply me, why no help for this project?

majoka (http://www.8051projects.net/user22104.html) 27 Ju l : 20:59

@ cutemanikutti

ask question in forum then u will be visible to everyone

gohilurvish (http://www.8051projects.net/user39447.html) 24 Aug : 01:47

Hi Guys,

I made this kind of project in my bachelors(2006) by soldering 328 LEDs .

Also last year, I assisted a student for the same and we made using dot matrix display. We used 6

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modules and made it dynamically expandable. Just just join other circuit and it can have more length.

We also added facility to store 4 message of 100 char size.

Also we can decide on which message to show or Save new message via Keyboard (direct to uC) or via

SMS (connected GSM module).

A little busy now so will post details on it later.

(I can always answer some quick questions)

Ajay Bhargav (http://www.8051projects.net/user1.html) 25 Aug : 03:09

If you want you can share your project with everyone here. It will be a great contribution to the

community.

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