I'm making a Tamagotchi, which requires that I keep track of the time since I last used my device, so that its hunger grows and whatnot. I don't own an RTC or anything of the sort, only an Arduino Pro Mini. This doesn't have to be accurate in any way whatsoever, just enough so that a number increase…

Keeping track of time since last used

Robin2 August 14, 2016, 8:09am 3

Nick Gammon's power saving tutorial may be useful

...R