Ali,

I can see two paths:
1) You can multiplex the 3 displays (11 pins used). See AN557 for an example.
2) Use 3 shift-register in cascade (i.e. 74595), in this case you use only
3 pins to control
all 24 outputs.

Ricardo Seixas


>Hi,
>
>In a PIC based project I need to drive 3 groups of 8 digits 7+1
>segment (including decimal point) LED displays.
>
>Any suggession will be appreciated..
>
>Thanks...
>
>