Need help with 7-segment displays

[AzimOthman]

hey guys, im currently working on a smart parking project using PIC18F4580 and im trying to use 4 7-segment displays to display the word "FULL" when the car park is full..

however, i have only one port (PORT D) available.. How do i get around to soling this?

Thanks in advance for the help guys!

 

[apolama]

USE 1-4 Demux. and you need to write a loop which switches the demux within 0.1s to make system unnoticeable of being blackout any character.

 

[AzimOthman]

thanks for the reply apolama,

how exactly is that done with the demux? can u explain a lil bit more..

 

[apolama]

try this.

in that case you need five pins and a for loop