How to build 24 digital clock using 74-163 IC?

Discussion in 'Homework Help' started by Casablanca, Nov 8, 2009.

  1. Casablanca

    Thread Starter New Member

    Oct 27, 2009
    11
    0
    Hello everyone..

    I need help in this : Using the 74163 IC(s) and any necessary gates, design a 24-hours digital clock which is fed by a 1Hz Signal.

    like 00:00:00
    HH:MM:SS
    if the seconds are 59 it will be cleared then the minutes will count one...etc.
    the way i tried it .. is to use for each "seonds ,minutes and hours" 2 ICs

    then Implement the clock on LogicWorks, use the HEX display to show the time as HH:MM:SS.
    how to use the Hex Display ??

    The 74169 is a 4-bit synchronous up/down counter, download the datasheet for the counter .use this counter to simulate a circuit that generates the following sequence:
    2,3,4,5,6 12,11,10,9,8 2,3,4,5,6 12,11,10,9,8 2,3,4,5,6 12,11,10,9,8 …. And repeat.

    How to enable up and down counter ??

    Thnx in advance ..
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    You might try to follow the instruction:

    Get the data sheet for that component, too.
     
  3. Casablanca

    Thread Starter New Member

    Oct 27, 2009
    11
    0
    Thnx for ur precious Advice ! :)

    i tried the second part which is the 74_169 counter and didn't get the result !

    could anyone look at the circuit and tell me Wat's wrong :confused:.. i did it using logic works ,, and if anyone want the original file i can send if u ask ,,
     
  4. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    What is the output of the one above?

    How I did this project many many years ago was to use 5 counters, with logic from the first one (seconds low) going through NAND/AND gates so when 12 was counted, 1 was output, a clock pulse went to the second counter (seconds high) and reset the first counter, the second counter did the same thing but counting to 5, then reset to 00, and clocked the next counter, which was two more cascaded (minutes low, minutes high) for 60 minutes, pulse out on 60, display 0, which clocked a final 0-12 counter.

    Using different counters, the setup may change a bit, but that is the overall picture. Lowering it to only 3 counter IC's would be a great improvement for the display.
     
  5. Casablanca

    Thread Starter New Member

    Oct 27, 2009
    11
    0
    that's the result:confused: "Attached"

    i first did the truth table to find the equations of
    DA
    DB
    DC
    DD
    PT
    LD
    D+
    C+
    B+
    A+
    and then drew it
     
  6. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    You might find it easier to use a 74LS162 BCD counter, vice the '169, which is binary and harder to use. The up/down feature is not needed.

    A decoder driver, like a 74LS47 is made to drive a 7 segment display.

    Get data sheets to see how the IC's work
     
  7. Casablanca

    Thread Starter New Member

    Oct 27, 2009
    11
    0
    it's not up to me to change the IC i use ..

    My DR. Who asked for it
     
  8. #ANGEL-SHIMY#

    New Member

    Oct 19, 2009
    2
    0
    when u run your connection on circuit maker
    whats the errors that show in the box?
     
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