Digital Clock

Discussion in 'The Projects Forum' started by rpinnint, Nov 11, 2008.

  1. rpinnint

    Thread Starter New Member

    Nov 11, 2008
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    I need to Design a digital clock for my Project that shows minutes, hours, AM/PM and days of the week.
    • Minutes and Hours displayed on seven segment displays
    • The days of the week and AM/PM displayed on individual LED's
    Can anyone give me an idea of how to start and method. I really appretiate your help. I need to submit it in a week.

    Thanks.
     
  2. Wendy

    Moderator

    Mar 24, 2008
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  3. rpinnint

    Thread Starter New Member

    Nov 11, 2008
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  4. beenthere

    Retired Moderator

    Apr 20, 2004
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    Perhaps if you could post up a more complete set of specifications for the clock, we could be more helpful. Is it the capacitors or the resistors that are not allowed?
     
  5. ad8bc

    New Member

    Oct 30, 2008
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    I like this article at HowStuffWorks.com: http://electronics.howstuffworks.com/digital-clock.htm

    It will give you the basics on creating a timing circuit that you can improve upon to build a clock.

    The power supply circuit with the 5.1V zener diode that creates a TTL-level 60Hz squarish-wave is really neat, I built it this past weekend for the heck of it and it works nicely and will give you a nice timebase to work with.
     
  6. rpinnint

    Thread Starter New Member

    Nov 11, 2008
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    Thanks for the help guys.. Both the capacitors and Resistors are not allowed. My Instructor is saying to use any TTL IC chips
     
    Last edited: Nov 14, 2008
  7. Wendy

    Moderator

    Mar 24, 2008
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    Interesting, did he have any advice as to how to handle the display, oscillator, and power supply? You'll note Bill Bowden's device uses TTL chips, so you have a good starting point. As to the rest, you'll just have to convert one logic type to another.
     
  8. beenthere

    Retired Moderator

    Apr 20, 2004
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    Yes, I think you might want to check as to where it is forbidden to use passive components. Think there might be some clarification on that issue.
     
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