The number pad on the left got a tenner base.
The counter IC needs a binary coder to proceed to that decoder IC for the 7-segment display.
The diode matrix is coding decimal input to binary.
It's working though but it's a bit awkward when it comes down to handling on this virtual workspace...in reality it'll be just fine.
The layout of number pad is just as we all know it for ages.
123
456
789
*o#
Press any number, then press * to load it.
Punch in # to reset.
That's it.
Cheers.
