Cascading 74190 IC’s to make a 4 hour clock

Discussion in 'The Projects Forum' started by asipple1, Aug 6, 2010.

  1. asipple1

    Thread Starter New Member

    Apr 13, 2010
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    Hello everyone,
    I am trying to make a 4 hour up counter with 74190 IC.
    The first one is a mod 10 for ones of seconds, the second one is a mod 6 for tens of seconds. Third would be a mod 10 for ones of mins and four would be mod 6 for tens of min. The fifth would be a mod 5 since i only want it to count to 4 hours. I would also like to know how to rest the counter back to zero? My trouble is how do i wire these up together so each one is triggered at thier proper times?
     
  2. windoze killa

    AAC Fanatic!

    Feb 23, 2006
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    Check out the schematic I posted in the garden railway thread. It can be modified for any time you like.
     
  3. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    If you are not limited to 74190's, a 4060 can supply clock and counting all in one IC, including 4 hours. If interested someone will come up with schematic.
     
  4. Wendy

    Moderator

    Mar 24, 2008
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  5. windoze killa

    AAC Fanatic!

    Feb 23, 2006
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    Yep. Thats the one.

    I had trouble adding the link.
     
  6. asipple1

    Thread Starter New Member

    Apr 13, 2010
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    Is there a way to reset a 74121 timer?
     
  7. beenthere

    Retired Moderator

    Apr 20, 2004
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    Only by removing power. Check the '123 - two sections and both have a reset line.
     
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