Digital Clock block diagram, Need urgent Help

Discussion in 'Homework Help' started by SSnake, May 3, 2009.

  1. SSnake

    Thread Starter New Member

    May 3, 2009
    Following is what is requsted from me, Please help, i mostly need help with PCB and speed adjusment.

    > Design an outdoor digital clock. This clock consists of four digits, two for
    > the minutes and two for the hours counting separated by the seconds colon.
    > The maximum count should be on the view 12:59 see the attached graph.
    > The digital output is taken on a set of outdoor LED clusters arranged in 7
    > segment format with typical load for each digit's segment 4000mA. ( Design
    > hint: use 4 of the attached LED cluster to form a segment.) The clusters
    > are connected to the PCB through a set of push connectors.
    > Adjusting this clock is maintained through two keys. One for fast advancing
    > and the other for slow advancing.
    > The speed of each is left to you to assign. The clock should keep running
    > accurate even in case of power off state ( by the aid of internal
    > rechargeable battery or any alternatives ( suggest!)
    > The power is supplied through a 12V DC power supply ( a transformer (220/12)
    > with AC/DC converter on the clock's board. ) the power supply should be
    > acceptable for outdoor applications.
    > Output: Design the following:
    > * System Block Diagram.
    > * Circuit schematic design.
    > * Firmware if any.
    Last edited: May 3, 2009
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    Post up the schematic you have so far and we may be able to make some suggestions.