1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

HELP: Alarm for Digital Clock using TTL

Discussion in 'Homework Help' started by ken2t, May 9, 2009.

  1. ken2t

    ken2t New Member

    Joined:
    May 9, 2009
    Messages:
    2
    Likes:
    0
    can you please give us your idea how to display
    ALARM and CURRENT TIME, using or not using multiplexers..

    using TTL (not MCU)..we are using 4 Seven Segment Displays for both hours and minutes

    12:00

    this should how it works: for exmple, your current time is 12:00AM and we want to set the alarm at 12:30AM, by using for example a switch we can change the display to its ALARM mode, and then after switching it again, the 7SegDisplay should display the current time and alarm time..

    HERE are the all switches used:

    1. ALARM on/off (SPDT)
    2. ALARM mode (relay switch)
    3. TIME mode (relay switch)
    4. HOUR (tack switch)
    5. MINUTE (tack switch)


    we appreciate your help..
     
  2. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

    Joined:
    Jan 4, 2007
    Messages:
    21,190
    Likes:
    644
    Location:
    Ex Yorks' Hants UK
    hi,
    If you use the SEARCH on the upper menu bar, for digital clocks there are a number of threads.:)
     
  3. ken2t

    ken2t New Member

    Joined:
    May 9, 2009
    Messages:
    2
    Likes:
    0
    yeah, i know..but the posts there does not answer my problem..i appreciate your help..
     

Share This Page