Add load caps in minimal arduino circuit?
I need to know if I have to include load caps for the 16mhz crystal. I am using interrupts mostly, but I will aadd delay functionality. It will have to be off for possibly 4 hours at a time- maybe up to 24 hours if I go really slow- exact timing is not a problem, I just need it to be power efficient. About how much drift would I have using a watchdog timer for a 24 hour delay? Would it just be easier to have an RTC?