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Need help with 7-segment displays

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AzimOthman

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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!
 

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.
 

thanks for the reply apolama,

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

Untitled.png

try this.

in that case you need five pins and a for loop
 

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