My darling husband brought home for me 2 clocks that used to be in an abattoir. I think these guys just told the time but hub thought they might be used as a countdown timer. One has a controller, the other one doesn’t, don’t know if that’s because someone removed it or they were linked – all the connecting cables were chopped off. Anyone have any suggestions on what this controller might be or where I can start reading up on it? Or if it’s easier/better to make a controller and just use LED board? Any insight would be appreciated.