Making a digital clock in Multisim - Please help me!

Discussion in 'The Projects Forum' started by zero_coke, Apr 2, 2011.

  1. zero_coke

    Thread Starter Active Member

    Apr 22, 2009
    294
    1
    Hi, so I have four synchronous counters:

    1) Counts from 0 to 9 and then resets back to 0
    2) Counts from 0 to 5 and then resets back to 0
    3) Counts from 0 to 4 and then resets back to 0
    4) Counts from 0 to 2 and then resets back to 0

    Now, I have 6 seven-segment displays and each one is connected to a BCD to Sev_Seg converter so I have all that setup.

    Now, I have 2 displays for seconds part, 2 displays for minute, and 2 displays for hour

    I intend on having the seconds go from 0 to 9 and then once it hits 9 it will bump up the first seconds display by 1 and so on.

    Can someone help me make this? I have all my schematics for the counters and the bcd to seven segment displays but I just don't know how to connected them...

    Please go easy on the terminology and such as I am still a student in 2nd year.
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    If you have schema's then attach them.
     
  3. codrod

    New Member

    Apr 2, 2011
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    0
    How do you want to connect the counters? What kind of drivers do you want to use for the counters? attaching the schema will be very helpful.
     
  4. zero_coke

    Thread Starter Active Member

    Apr 22, 2009
    294
    1
    I think I will do this, but I will need your guidance:

    I have 6 counters now (0-2, 0-4,0-5,0-9,0-5,0-9) for hh:mm:ss respectively

    Now, I will attach the last seconds counter to a function generator square wave @ 1KHz and the clock for each counter to the left will be the outputs that reset the current counter. Would this be the good approach?
     
  5. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,740
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    Nice try to steal some one's work
     
    codrod likes this.
  6. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,534
    Have you looked at Bill Bowden's website, he has several digital clocks up?

    I'm thinking of started some submissions for the book doing something similar. It hasn't gone anywhere yet though.

    http://www.bowdenshobbycircuits.info/

    Digital clocks

    Be aware, the hour clock is different...

    11:00PM
    12:00AM
    01:00AM

    And the 24 hour clock isn't...

    23:00
    00:00
    01:00

    Which logic family? CMOS or TTL. I'd go with the 74192 or 74193 for TTL, and the 4029 for CMOS. There is always the old standbys of the 7490 and 7492 for TTL, they were designed for it.
     
    Last edited: Apr 3, 2011
  7. codrod

    New Member

    Apr 2, 2011
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