This is my first post. I’m new to the coding thing. We’ve built a count down timer using two nixie tubes. We copied the code from somewhere and it works great. What we are trying to do is once a puzzle is completed it stops the timer and the remaining time is shown. The timer is controled by an arduino Uno. When a 6 digit code is entered into a keypad run by another Uno we would like the timer to stop and continue to show the time.
Any help would be greatly appreciated.
Please start here and follow the instructions. With what you posted, no clue what you want, or how it could be achieved.