Hello Norbert,You can find in the attached document a view of my 5seg leds typon at scale 2. The 7seg leds PCB made with this layout works fine. You can modify easely this layout as you like for 3 or 4 7seg leds PCB, just remove the not used digit. Sorry for the 10 jumps I made, I don't found another solution. I use 7 seg leds Agilent Technology HDSP-7513.RegardsChristian

This is the good attachment, may be?Christian

Thanks for sharing.I must redesign the pcb a bit because I will use the 10 mm 7 segm leds. The difference with the ones you use is that the Common Cathode is pin 3 and 8 instead of 1 and 6. But thats a minor problem. From the discussion we had , I now know exactly how the display boards functioin, so that I can adapt it to my own needs.Regards Norbert