Scrolling LED Displays without Using Microprocessors...!!

Discussion in 'The Projects Forum' started by RRITESH KAKKAR, Mar 30, 2011.

  1. RRITESH KAKKAR

    Thread Starter Senior Member

    Jun 29, 2010
    2,831
    89
    Hi,

    This is simple one nybble (4 bits) scrolling displays. it uses all basic logical components. like:



    1.) Power supply (12V).
    2.) Clock pulse ( 555 IC).
    3.) Decade counters ( 4017 IC).
    4.) Couple of AND GATES ( CMOS 4081/ TTL 7408).
    5.) SEVEN Segment display (as per message).
    6.) BCD to SEVEN Segment Driver ( IC TTL 7447/ CMOS 4011).
    7.) OR GATES (7432).
    8.) A wire, PCB, switches, etc…

    http://www.youtube.com/watch?v=C9WN89WEUnw&feature=player_embedded


    http://www.youtube.com/watch?v=nNYkSOEkZ2g


    http://www.youtube.com/watch?v=g_Rc8HM42Zg&feature=mfu_in_order&list=UL


    these all video will tell working of this projects.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    I found this post in "the completed projects" forum.
    As the schematic is not complete, it is not a completed project.

    Bertus
     
    RRITESH KAKKAR likes this.
  3. RRITESH KAKKAR

    Thread Starter Senior Member

    Jun 29, 2010
    2,831
    89
    Here is the *asc file of it. & the display part can't be drawn as there is no TTL 7447 BCD to 7 Segment IC & seven segment displays in LT Spice!!
     
    • 123.asc
      File size:
      17.2 KB
      Views:
      21
  4. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    Then you need to draw it by hand and scan it or computer. LT Spice is not the only way to draw schematics. Personally I never use it, and I do mean never. I also do not use my PCB files for illustrations. My schematics are amongst the best drawn here, but that is because I don't try to take shortcuts and use design files for illustrations.

    Another thing, if a person does not use your software they can not see the files. One of the goals of Completed Projects is to allow other people to duplicate your project is they want. If you limit them to your software they may never get to see your files.

    For this reason .png or .gif files are best, as they are pretty much universal for all computers. I'm betting even Macs can use them, Linux can. I will never be able to view your .asc file. Think about it.

    If your goal is to be an engineer or tech then you are going to have to learn how to communicate using universal tools.
     
    RRITESH KAKKAR likes this.
  5. RRITESH KAKKAR

    Thread Starter Senior Member

    Jun 29, 2010
    2,831
    89
    Ok, i will post hand drawing schematic. soon!!

    Thanks.
     
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