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Connecting multiple 4017's

Discussion in 'General Electronics Discussion' started by Stuart, May 8, 2013.

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  1. Stuart

    Stuart

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    Jan 24, 2013
    I'm trying to design an Electronic Roulette Wheel using a 555 timers and a 4017 decade counter all linked up to 37 LED's.

    I'm really stuck at the moment, I have only managed to design a circuit that incorporates 10 LED's. And I need another 27.

    The 10 LED's I have are connected to the 4017's pins (obviously) and since the chip does not have 37 pins I'm assuming I need at least 4 4017's connected to each other but I have no idea how to connect them all together.

    Can anyone please help me? Any tips or even a schematic diagram of a similar circuit where 4 decade counters are connected together?

    My Electronics knowledge isn't that great (yet) so I apologize if this is easy or you don't know what I mean.

    Stu. :)
     
  2. BobK

    BobK

    7,682
    1,688
    Jan 5, 2010
    Edited, what I said was wrong, must think some more.

    bob
     
  3. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
  4. BobK

    BobK

    7,682
    1,688
    Jan 5, 2010
    If you look at figure 7 of this datasheet it shows how to connect multiple 4017s to get a longer sequence counter. You will need 5 of them to get a ring of 37 outputs. You get 9 outputs from the first one, and 8 each thereaffter.

    http://www.doctronics.co.uk/pdf_files/4017.pdf

    Bob
     
    Last edited: May 8, 2013
  5. Stuart

    Stuart

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    Jan 24, 2013
    Thanks guys, I hope that design works CocaCola I really don't want to spend time simulating it only to find out it doesn't work.

    And Bob, I can't believe I didn't think to look at the data sheet haha :)

    Thank you for your help, hopefully this solves my problem.

    Stu.
     
  6. Stuart

    Stuart

    23
    0
    Jan 24, 2013
    Connecting LED's to 4017

    Hi there, I'm building/designing my own Electronic Roulette Wheel using a 555 timer with 4017 decade counters with 37 LED's.

    I'm currently trying to cascade multiple 4017's using this schematic shown...

    [​IMG]

    http://tinypic.com/r/b8juxw/5


    I'm not sure I understand this schematic too well, I can't figure out where the LED's would connect to? Do the connect to the pins on the chips? or the AND Gates?

    If anyone can understand this schematic more than I and can maybe explain it a little that would be hugely appreciated.

    I know I'm asking for a lot here but I'm really stuck and can't move forward with my project without understanding this schematic.

    Thanks,

    Stu.
     
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