Hi C,
I understood your original assignment was a Chess timing clock.?
Looking at your last few posts, your original project is now suffering from what is known as 'feature creep'.
It is always very tempting to add 'bells and whistles' to your project, try very hard to resist.
To paraphrase what KISS says in post #79, get the original circuit working, but allow for 'later' expansion.
Did you study and understand the 4510 d/s regarding the /TC pin.?
Also what was your answer regarding the current limiting resistors for the 4511.?
E