Hi How about simply adding 1 ms every other second? You could then fine tune it by picking a small number of seconds to not add a ms to.
Bob On Nov 24, 2011, at 7:16 AM, Javier Herrero <jherr...@hvsistemas.es> wrote: > El 24/11/2011 13:56, Miguel Gonçalves escribió: >> >> >> Right! That is what I am doing. >> >> The problem is the drift between adjustments. Arduino's clock is slow 25 ms >> every minute and if temperature changes it will surely be different. >> >> > That is more than 400ppm error, that sounds quite high. Is the clock > frequency of the Arduino so drifted? I would try first to check (and correct > a bit) the source of that error. If the crystal frequency is ok, perhaps > there is an error in the programming of the timer that generates the timing > interrupt. > > Regards, > > Javier > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
