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Led Display

Discussion in 'Electronic Basics' started by Hallhair, Mar 22, 2005.

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  1. Hallhair

    Hallhair Guest

    I have a 2) 0.8" 7-segment Led displays and 2) black jumbo pushbutton
    switches I want to have a score board so that when i push the button
    the display will say one and when i push it again it will say 2 and so
    on and so on till 9 then when i push it again it will saw 0 but that
    is all i have and i know i need other stuff to make this work and i
    wanna be able to use 120 volt power so i know i need to have a power
    converter but what size?? is there some web site that i can go to that
    will help me make what i wanna make?? please ask questions and i will
    try to answear them to the best of my knowledge.
     
  2. John Fields

    John Fields Guest

     
  3. Lord Garth

    Lord Garth Guest

    A common linear regulator will be able to provide more than enough
    current to run your counters. I would use a plug pack that converts
    the 120VAC to something in the 7 to 12 volt range. AC output is fine
    since this means the plug pack is only a transformer. You will need
    four rectifiers and a couple of capacitors in addition to the LM7805
    regulator. A heat sink to mount the regulator on will also be needed
    as it will tend to get hot.

    You can scavenge most of these items from a broken computer power
    supply. The goal here is to build a 5 volt power supply to run the
    counters.

    Do you have soldering equipment and a multimeter?
     
  4. Hallhair

    Hallhair Guest

    The specs for the led display i have are on this page
    http://www.allelectronics.com/spec/SDA-801.pdf and yeah i have a
    multimeter and i have good soder guns and everything but all i need is
    to learn how to make a led display that counts can somone please make
    a list of what i all need so i can just print it out and get
    everything i need then i can get the steps on how to build it after
    but any other questions or??
     
  5. Rich Grise

    Rich Grise Guest

    Probably not the whole thing, for free. It's a whole construction
    project, and for a beginner, a major one.

    Your best course of action would be to surf the web for electronics
    tutorials, construction articles, and whatever you can find, and also
    go to the public library and see what they have about electronics.
    The ARRL Handbook and The Art of Electronics are a couple of good
    books for this.

    Good Luck!
    Rich
     
  6. Eric R Snow

    Eric R Snow Guest

    As someone who is good at following directions but limited in
    electronics knowledge (not just electronics) I have found using
    googling for "circuits" brings up many sites with links to many other
    sites that have all sorts schematics that a beginner can follow. And
    counter circuits were for sure in there. In fact the following link
    may work for you. Read about it. The guy who put up the web site is a
    nice guy. Anyway, here it is:
    http://www3.telus.net/chemelec/Projects/Counter/Counter.htm

    ERS
     
  7. John Fields

    John Fields Guest

     
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