fezder
Well-Known Member
ds1307 is what I use, needs only battery & crystal, I set time manually as automatic is 30 seconds off even if taken from computer...if it works, I'v never used, so dont know how,do know a bit about i2c, what is part number?
isnt external used with watch battery so it doesnt forget the time?
might be a good idea!
https://datasheets.maximintegrated.com/en/ds/DS1307.pdf