8 5x7 matrix displays+16f84a

[ngeronikolos]

Hello my friends,

I am working on a project with 16f84a to display some data on 8 5x7 matrix displays.
Please send me any useful information,details in order to have an idea?

Thanks

Regards
Nikos

[ufuk0106]

I am working on a project with 16f84a to display some data on 8 5x7 matrix displays.
Please send me any useful information,details in order to have an idea?

was you learn that. i happy if you help me. thanx..
Thanks

[NavMicroSystems]

Nikos,

if you are using simple 5x7 matrix displays with no embedded logic it is going to be hard for that poor 16FF84A to do all the multiplexing.
To drive 8 Digits you would need additional hardware anyway.

Easier would be to use a Driver like MAX6953
or Matrix Display Modules with embedded controller.

[ngeronikolos]

Dear Ralp,

I am working a project,for my company,using
max6953&4 5x7 led dot matrix (common anode) controlling by a pic
16f84a. Using the information of maxim I try to controll the driver via
the ltp of my computer without any success.The software I have already
installed on my pc is working property(I checked with a osciloscope the
scl&sda that the computer send).So the problem is with my circuit.

I use Cset=27pF ceramic to the osc pin21,do you think that this would
be the problem?The cable lenght is 0,5m between the pc and the driver.I
am trying to controll the max6953 via the ltp with the software free
from maxim site. I find from the data sheet of the product the waveform
at the pin 21(osc)(Cset).In my case,while my max6953 is connected to 4
dot matrix's leds&to ltp port of my pc,the signal amplitude is too
low(it seems to me like noise).I can not see that waveform with my
osiloscope.Do you think that the Cset cause the problem?Why I can not
display what I send to it from my pc?What can I do to solve my problem?

Help me boys,please!!!

Thanks
Best regards
Nikos Geronikolos

[NavMicroSystems]

...using max6953 & 4 5x7 led dot matrix (common anode) controlling by a pic 16f84a.
...I try to controll the driver via the ltp of my computer without any success.
The software I have already
installed on my pc is working property
(I checked with a osciloscope the scl&sda that the computer send).

And what does the PIC do?
If you are trying to control the MAX6953 from your PC this is the wrong Forum category to ask for help.



So the problem is with my circuit.
I use Cset=27pF ceramic to the osc pin21,do you think that this would
be the problem?The cable lenght is 0,5m between the pc and the driver.I
am trying to controll the max6953 via the ltp with the software free
from maxim site. I find from the data sheet of the product the waveform
at the pin 21(osc)(Cset).In my case,while my max6953 is connected to 4
dot matrix's leds&to ltp port of my pc,the signal amplitude is too
low(it seems to me like noise).I can not see that waveform with my
osiloscope.Do you think that the Cset cause the problem?Why I can not
display what I send to it from my pc?What can I do to solve my problem?

Again you are talking about a PC, what does the PIC do?

Could you post your schematic?

And please be as precise as you can, see: this (http://www.picbasic.co.uk/forum/showthread.php?t=1254)

[ufuk0106]

i wanna 5x8 matrix led display with pic.( moving singboard). can yıu help me more information this? circuit picture and samples code?

thanx..

[ngeronikolos]

Myfriend Ralph,

I know exactly what the forum referring to pic.
Everything I said is my first step.

1.Controlling the max6953 successful.This will help me to understand the
transport stream that max6953 can recognize in order to do my job.

2.Replace the pc with pic16f84a.The same jod,the same stream.


Thanks
Nikos Geronikolos

[NavMicroSystems]

Nikos,

See AN 1033 (http://pdfserv.maxim-ic.com/en/an/AN1033.pdf)

with PC code (in what language ever) we can't help

[ufuk0106]

i wanna 5x7 matrix with movig sing.
can you help me.
1. circuit sheme
2. picbasic code

thank you very much...

[NavMicroSystems]

ufuk0106

The only thing I have to add to Melanie's post (http://www.picbasic.co.uk/forum/showpost.php?p=7904&postcount=4) is:

We don't need the very same question over and over again on different threads.

[mister_e]

ufuk0106
do you also want that we spead butter on your toast, drive you to school by holding your hand???

AND in addition to Ralph, this is not a copy/paste forum where we build everything for free. It's a place to help user with something that is, at least, on a bread board with a minimum of code lines.

BUT If you really want it, you'll have at least to pay the design time.... wich is going to be more than the Melanie's suggestion.


Come on, do a google search for matrix display schematic, multiplexed display and you'll find at least soemthing to start with. ONCE you get it, and understand how it's work, try something. THE MAX chip already suggested will do the job. Just few minutes, hours, week (depending) and TADA!!!! Do it step by step. If you really want to learn, you'll have to do some homework. By using already made stuff.. you can't learn.

BTW have a look to counter.zip (http://www.melabs.com/resources/samples.htm#submitted) this can help you a little bit. Schematic are in the pack, free from me to everyone.

Good luck!