Hello;

I saw the 16x8 LED Matrix Display, it cool. i have a doubt. can it be expanded to 64X8, if so what are all the changes should i make in program.

In theory yes, however the time required to 'scan' the display will get longer as you add more. You will also need to calculate the amount of power the transistors must source to the display too, and ensure that you don't overload them.

As for the programming, take a look at the source; it shouldn't be too hard to figure out what needs to be changed

Hi friend....
I wana ask some dificult question for my about LED MATRIX display:
"A6276 16-bit serial LED driver (which controls the columns of the display) and a 74ACT164N serial 8 bit shift register"

You said, that you are using that ones details, but a question is, that program do you use to buil electronic - principal schem.?

I use Proteus 7.7 but I cant find any catalog on internet with this details...
Can you help a lil bit?

P.s also I read that you used clock driver is ds1302? is that right?

Thanks very much...

The schematic diagram was created in Eagle. The PCB artwork was created in ExpressPCB. The real-time clock is a DS1302. If I didn't understand your question properly, please ask again.

/Simon

Ok, I got a lot of information...
Just now, I wana ask what version of eagle do you use? and does it has all shematic details on this program?
Also can I do a pcb autoroute on eagle?

I wana take a look, how it all was done...

Actually that project was the only one I did in Eagle, since then I've been using ExpressPCB and ExpressSCH simply because they are free and nice and easy to use. You can, however, autoroute PCBs from Eagle although personally I prefer to do it by hand... but that's just me

hi friend.
I have another question, did you use some program to simulate your led display, or just do and turn on after finishing?

I don't really use simulators; most of the time I build up projects on the breadboard creating the schematic diagrams as I go. Sometimes I use the simulator built into MPLAB but really only for testing complex code rather than hardware.

hi again...
I wana ask, that in your opinion is the best way to do matrix dislpay or make from diods, like you did, or better to use 2 LED matrix 8x8!?

Or it would be some trouble with program? what do you think...?
Thanks

It shouldn't be a problem to use a matrix provided it has the same polarity as the display used in the project. The 8 transistors source power to the LED rows and the A6276 sinks power from the LED columns. Provided the 8x8 matrix modules are wired in the same manner you shouldn't have an issue.