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


Problem:
> 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.

 

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