need a circuit diagram of 24 hour digital clock

Discussion in 'The Projects Forum' started by lenn24, Jan 23, 2009.

  1. lenn24

    lenn24 Thread Starter New Member

    Joined:
    Jan 23, 2009
    Messages:
    6
    hi guyz..need some help..we have project regarding a 24-hour clock..we will use the asynchronous counter..we have problem when it comes to hours..pls help me..
  2. beenthere

    beenthere Retired Moderator

    Joined:
    Apr 20, 2004
    Messages:
    15,815
    Location:
    Missouri, USA (GMT -6)
    It sounds like you have been able to counts seconds correctly. Do the same thing - use an external AND gate to reset the hours counter string to zero when the count = 24.

    There are several types of asynchronous counters - some in binary and others with BCD outputs. There are also several different logic families. It helps to be specific about these things when asking for help.
Similar Threads
Forum Title Date
The Projects Forum Need help decoding the attached circuit Tuesday at 11:55 PM
The Projects Forum 12v power off delay circuit. Need Help Saturday at 3:29 PM
The Projects Forum I need help concerning two simple circuit designs. Jan 22, 2015
The Projects Forum need help please with traffic light circuit.. Jan 11, 2015
The Projects Forum Needing a 555 12v LIGHT activated circuit and a DARK activated circuit Dec 27, 2014

Share This Page