: To save pins, all four digits share the same segment lines (A-G), while four separate "common" pins toggle each digit on and off rapidly.
: A Proteus simulation file used to test the 4-digit counter virtually before building it. Where to Find the Download Download 7seg count4D flo rar
If you are building this manually, a "4D" (4-digit) counter usually uses: : To save pins, all four digits share
: The compiled code ready to be flashed onto a microcontroller. : To save pins