Free Project - 245 LED Display

[T.Jackson]

Sorry - as I've said before, the PCB artwork isn't available.

[magu]

i made the pcb in orcad layout, but it doesen`t WORK !!! . Tell me the problems... plsssss. And the led should lit when the serials cable+ 5v cable is connected to the board or not? or when the 5v cable is connected?

On the link you can see the board... The caps than are not shown i have reposition them... the picture has made without them...

http://www.zamfirelu.org/led/fata.jpg

[magu]

I don't remember seeing any money back guarantees anywhere...I could be wrong. How much did you pay for this project?

And I built it over the weekend (although I simulated the bulk of the LEDs and left a couple of banks off), worked fine for me.

i spend over (in your currency) 30$ (american) . If you have orcad and layout i attach the files, the design of the board and the pcb. I examin the circuit over 14 times and i draw it good. If you can send me your pcb or design of the board it will be helpful.. thx..

[fazan83]

what ? : "????????????????????????????????????????????????? ??????????????? ."

Magu I am also beginner....but I think you are asking something but you ask somtehing that too general and may be too hard for you to chew one shot.

Why not you create a simple flashing LEDs 1st.
Be familiar with with the PIC 1st. The Circuit and PIC Basic Pro Language 1st.

Then once successful you can start troubleshooting this project why not you try to always on all the row 1st and cascade the counter.
Just high all the Rows 1st.


TRISA = %00000000
TRISB = %10000000

'Variables...

ColPosition VAR BYTE
ClockColsCounter VAR PORTB.6
ROW1 VAR PORTA.2
ROW2 VAR PORTA.3
ROW3 VAR PORTB.4
ROW4 VAR PORTB.3
ROW5 VAR PORTB.0
ROW6 VAR PORTB.2
ROW7 VAR PORTB.1
ResetColsCounter VAR PORTB.5


'Reset 4017 counters
ResetColsCounter = 1
Pause 100
ResetColsCounter = 0

ROW1 = 0
ROW2 = 0
ROW3 = 0
ROW4 = 0
ROW5 = 0
ROW6 = 0
ROW7 = 0

Matchmode:
ColPosition=0
ROW1 = 1
ROW2 = 1
ROW3 = 1
ROW4 = 1
ROW5 = 1
ROW6 = 1
ROW7 = 1

CascadeCounter:
For ColPosition = 0 to 37
PULSOUT ClockColsCounter,100 'to create a PWM for 4017 counter clock
Next ColPosition

Goto Matchmode:
END

Do not think to fetch the data from the EEprom 1st.
By doing this you know that your circuit is ok. (power supply, micro and driver is ok)
Then you can start deal with the EEPROM.

Just Try a basic thing 1st once you verified the basic thing works then you go to the harder thing.

Nobody can help you if you just keep ask general thing why it doesn't work.

[Pic_User]

hear this. , mr trent give the scheme, the VB program, the hex for the PIC . All this should be ok... idon`t have do some tests if all the documentation is complete with the information. If you say to do tests then the HEX for the pic if broken. If you have build the board , you have program the PIc with the hex am plug it on the board and work... NO??? . No changes in the hex or anywhere else.

Hi Mr. Magu,

Welcome to the MELabs PICBASIC Forums.
We are a diverse group of people.
There are people of all levels of capability, and reasons to be members of this forum.
The common thread, in general, is PIC chips, PICBASIC (PBC) and PICBASIC Pro (PBP) code, and electronics related to the same.

Nobody is paid to moderate, read or reply to members posts.
There is no one assigned to solve problems.

Some of the members help greatly by posting projects and project ideas. Some, help by answering other member’s PBC or PBP questions. Mostly the knowledgeable members spend hours of their time answering thousands of questions. They do this without pay, without gain. Just to help each other out. I learn every day.

Skimask and Trent and the others have replied to your post repeatedly. The common reply to you is: Start smaller. Gain experience. Work your way up circuit complexity. Work your way up programming complexity. Gain an understanding of the process, and the method.

You don’t want to invest the time and effort. We understand you have invested a great amount of time, effort, energy, money, frustration. Because, you have “hardwired” the completed circuit, you are reluctant to test a piece of the circuit at a time. You would have to pull the completed project apart, or buy new duplicate parts. This is a real problem for you.

Fakhzan (fazan83), was nice enough to write special code for you, to help you, find the problem. He took the time to write the code, and explain the process, to start you on the “trouble shooting” process. This is a brilliant “way around” your dilemma. Test the finished project, with a custom testing program. Great idea Fakhzan!

If you would consider what these knowledgeable, engineering professionals would receive in compensation (pay) for the same number of hours consulting or engineering. These people have invested more into answering your questions, for your project. They don’t have a problem. You have a problem. Demanding that others answer your problems, while refusing to even try any of the suggestions, shows that you, obviously have no idea how this great forum works.

So my suggestion to you:
Start smaller.
Gain experience.
Work your way up circuit complexity.
Work your way up programming complexity.
Gain an understanding of the process, and the method.
Added:
Gain an understanding of the forum, and how it works.
Read previous posts, for hours.

The main problem seems to be, you are one project oriented, and focused. The forum is focused on always learning a little more then we already know. Step by step, never giant jumps in knowledge. Build projects a little more complex each time.

If you wanted a scrolling LED sign that works “right out of the gate”, you should have just bought the commercial, finished product, that Trent linked to. That is not what the forum is all about.

If the project worked for Trent and others, it is impossible for anyone, to just tell you why your project is having trouble. You are the doctor with the patient. If you built it. If you programmed it. You must “trouble shoot” it. Refusing to consider helpful suggestions, demanding help, is not the correct path.

We are sorry that your project is causing you pain. I think most of us have been there, “a project too far”. A project that was too big for our experience. When it didn’t perform, we had no idea what to do. A costly mistake in time and money, but a lesson learned. Then, we can come to the forum, with advice for others, to not do the same.

-Adam-

[magu]

i have a relativy simple question about the montage of the board. The ELECTRO CAPS where do i have to place them?

[magu]

and for those who had build the proj and it work. I think the HEX is incorrectly. do you program the PIc plug it on the board, next plug the eeprom and start.? there are ben no problems?