I'm trying to set up different Variables (Seconds) via Push Button. When I press the start Button it should Countdown.
My Problem: Variables are stored in Seconds ie 180 (for 3 minutes) but i want to get output on LCD as 03:00 How should I turn 180 into 3 and Display as 03:00, 02:59, 02:58 etc How should I display "03" and how the "00" Seconds. Another: Counting up (1, 2, 3 ...) works, but down not.
It should be solved without Delay. With the build in millis.
I searched for Days for some hints and I have got something in my Head. On the Web I found only Countdowns with Delay.
Any Ideas? Libs? Hints?
I cant believe I'm the only one with this (simple) problem.