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Fun with LED dot matrix

Discussion in 'Electronic Basics' started by Impmon, Oct 31, 2003.

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  1. Impmon

    Impmon Guest

    I just picked up a bunch of surplus 8x8 LED matrix and I wanted to have
    some fun. They have column anode and cathode row (fairly common design
    for dot matrixes) and I wanted to put it together and mount it on my PC
    with random light flashing like some of those old 70's sci-fi shows.
    Make it look like my PC's doing some serious computing. ;)

    Obviously the question is how I could do a random generator? I could do
    a digital via computer but I don't want to shoehorn a C64 inside the PC.
    Is there a simply DIY project somewhere explaining on random binary
    generator? I'll probably have the generator on each rows and use 4017's
    on each columns (with transistor driver)

    Or is there a better use for LED dot matrix?
  2. Don Taylor

    Don Taylor Guest

    I've made a few prototype displays in the past, where each led mapped
    to nn kbytes of the computer's memory (would need to be nn megabytes now)
    and that isn't difficult to do. You can either use software for part
    of this or all hardware. With current bus speeds it would take a little
    more hardware to do this. But when you do this you can actually see that
    your PC is doing something. Lots better than random blinking.
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