Thanks, but 7219 wont work. The PCB I have to interface with has common traces for the segments, but 16 individual pins for the digits. The PCB is part of a flight simulator, and can be found at:
https://www.simucockpit.fr/a320/6-le-fcu-les-efis/
It's the FCU PCB.
It has common leads for 7 segments and 16 individual leads for the digits, 2 groups of 5 and 2 groups of 3. Even if the 7 segment pins were split into 2 groups it still wont work because the traces running to the left serve 6 digits, while the traces running to the right serve 6 digits. I would love to redesign this board to work with 7219, etc, but don't have the PCB design skills. My alternative is to figure out a way to do it with Arduino.
If someone wanted to tackle redesigning this PCB and add a 7219 daughterboard on the back I would be grateful, and able to pay a little bit for the work.
Thanks,
Buddy