Re: 5x7 LED matrix fixed display

Englishman in Ankara wrote: 
Maybe I'm trying something too simple, but I couldn't find what I need
on the 'net...

I want to display a fixed message on a 5x7 matrix LED panel. Actually a
few (6 or 7) side by side.

The only circuits I can find are for SCROLLING displays.

Is there a simple way of driving a multiplexed LED display? maybe using
simple logic not PIC or microprocessors.

Any ideas would be appreciated...



maybe a bunch of shift register connect in a circular fashion can do the job, break the connection to load the new datas, plus some counters and decoders plus some mixed gates to connect all.

but the question is :

using discrete logic you need lot of chips, using a micro you put inside the micro the 'data memory' and the all logic to do the refresh and you need only the led drivers outside the micro.

I tought that at slow speed micro almost always beat discrete logic, my pcb maker charge lot of money and a single micro is soooo small :-) !

.

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