> Hi to all!
>
> Is there anybody can explain me further the circuits description or
> operation to operate a 3 display multiplex 7 segment?

        There are a few ways, it depends how many pins you have free. If you will
only be showing the numbers 0 through 9 then a good way of doing it is
connect 4 pins to a binary to 7 segment display decoder, and connect one pin
to the common anode (or cathode) of the display. From there you simply
toggle each common anode (or cathode) pin one by one, each time outputting
the number you want to display on that digit on the 4 pins. If you need to
display things other than numbers as well then you will most likely need to
use 7 pins, one for each segment. Hope this helped, TTYL

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