How can I make a countdown timer that runs for 3 years? Answered
I want to have a countdown runner that counts down the seconds (94,608,000). Ideally it only displays the seconds and has no other function. Ideally it does not have to be connected to an external power source but connected with some kind of battery that does not have to be exchanged for 3 years.
Any ideas how to do this? Arduino?
Very new to this community and grateful for any advice!