I was building a digital clock using Arduino Uno and ds1307 rtc module for my college project.
But the problem is I cannot accurately set time in rtc module, there will be always some error (in milliseconds). So that error will gets added and the difference would be larger...so can anyone suggest me how to set accurately...?

 

hi Eartian,
Why do you think the mSec error will be incrementally added.?

Post your Sketch.

E

 

hi Eartian,
Why do you think the mSec error will be incrementally added.?

Post your Sketch.

E

I meant to say, when I disconnected Arduino from power source for a night, I got 2 to 3 seconds of delay to which I previously given

 

Hi,
How are you powering the DS1307 overnight, ?
E

 

Hi,
How are you powering the DS1307 overnight, ?
E

It has in built battery,...button cell i guess

 

It has in built battery,...button cell i guess

Hi,
Check the condition of the cell.
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