I want to build a clock with the arduino due. I have some ideas and some questions.
Should i use the internal 32kHz or an external with the RTC? which accuracy has the internal quartz? or an external one?
Should i use a gps module to get the time, its easier because you don't have to initialize anything, but the connectivity indoors might be bad. Maybe someone has experience with gps modules indoor?
can i supply the arduino with a small chip battery or is it not strong enough to keep it counting on even when i unplug the device. There are some low power possibilities.
Best regards Allinev