On 11/10/09, Robert Rolf <Robert.Rolf@ualberta.ca> wrote:
>
>
> Vasile Surducan wrote:
>
> > BTW,
> > assuming you want to build it from scratch, how many IO pins will be
> > necessary for a
> > 7 seg clock displaying:
> > dd:mm:yyyy     hh:mm:ss:tt   totaly16 digit
> > where the format displayed is day:month:year  hour:minute:second:milisecond
> >
> > Vasile
>
> TWO. Clock and data.

Without any external components please. Charlieplexing is much
expensive than display itself when used with external transistors.

Vasile
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