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LED Scroll Message Display without Computer Control

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wmyatthu

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Hi
I want to make a LED Scroll Message Display with a PIC microcontroller (PIC16F877A) . And I want to set the characters manually by the switch not by the computer. I'd seen one of those kinds in an electronic exhibition. It is completely controlled by 4 or 5 switches (Set, Write, Up, Down, Left, Right) I think. So, you are warmly welcome to this topic to discuss about this type of LED Display. Thanks.
 

Maybe he or she means a PLD controlled display. But what kind of LED display?? Dot matrix, 7 seg.??
 

Hi Friends,
Thanks for your reply. I mean dot matrix display. And I want to put the control program and characters table in the PIC and I will select the characters by switch. Thanks.
 

ok so u want your editor on your display borad not through pc ...... its easy, i have seen several display board like u want
 

Up and Down switches function as up and down counter where every count has equivalent ASCII in your code or rom character table, while Left and Right switches work as array pointer for which byte you have to set.



https://www.youtube.com/watch?v=jWnUlMEH25M
 

I'd use an EEPROM and a smaller PIC.
Just memorize your messages in the EEPROM and use switches to call them back and drive LEDs.
Regards
 

hi to you! im a fifth year computer engineering student and im planing a desgn project.using 5x7 dot matrix to display a running message,but the message can be change.im also using a pic 16f877a micro controller.can you help me with the software and hardware?
 

can you help me with the software and hardware?
 

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