Sorry, I was looking for Graham's Arduino code; clearly my comprehension and clarity limited on the phone. On Oct 3, 2013 3:53 PM, "Sarah White" <[email protected]> wrote:
> http://www.satsignal.eu/raspberry-pi/DigitalClock.html > > third paragraph: > > I've provided the source and binary files in >>>this<<< Zip archive, so > you can either run the program as-is, or modify it to suit your own > preferences. > > On 10/3/2013 6:43 PM, Phil Genera wrote: > > Is your code posted anywhere? I've been meaning to do roughly the same. > > > > -- Phil > > On Oct 3, 2013 12:07 PM, "Collins, Graham" <[email protected]> wrote: > > > >> David, > >> > >> Your raspberry-pi NTP clock is very cool. > >> > >> I have put together something along the same line but is in reality > just a > >> network connected NTP disciplined clock display using an Arduino and a > >> typical 16x2 LCD housed in a small project box. > >> > >> The Arduino has a network shield and get's it power from a USB port > >> although it could be powered by a battery or wall wart type of supply. > >> > >> When it starts, the device attempts to get an IP address using DHCP. > Once > >> that is sorted it attempts to sync to my local GPS disciplined NTP > server, > >> then sets and displays it's time. It resyncs every some value between 15 > >> and 30 minutes with the NTP server. If ever my local NTP server can't be > >> found, it will attempt to sync to an outside NTP server on the > internet. It > >> keeps pretty good time, not "time nuts" level but is always within a few > >> tenths of a second which is suitable for it's intended purpose. > >> > >> Basic time keeping of the Arduino uses it's 16MHz crystal clock and > there > >> is some provision for adjusting in code which I have done to improve > it's > >> time keeping. I am toying with the idea of adding a 1 PPS input but just > >> haven't gotten round to it yet. > >> > >> All the bits and pieces of the code was copied from existing projects > and > >> libraries it being just a matter of finding the appropriate bits and > >> pieces, putting them together and making changes in a few places to > improve > >> it's time keeping. It was a fun project to put together and has proven > so > >> useful in my lab that I will probably put together a couple more. > >> > >> Cheers, Graham ve3gtc > >> > >> > >> =================================== > >> > >> Max, > >> > >> I see similar things here. I've always put it down to relatively poor > >> circuitry in the radio clock, which is why I built my NTP-controlled > wall > >> clock! > >> > >> http://www.satsignal.eu/raspberry-pi/DigitalClock.html > >> > >> One radio clock is below. That particular MSF clock is actually not too > >> bad - visibly it's in sync with the NTP clock (which itself is within a > few > >> microseconds of GPS time). > >> > >> 73, > >> David GM8ARV > >> -- > >> SatSignal Software - Quality software written to your requirements > >> Web: http://www.satsignal.eu > >> Email: [email protected] > >> . > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > >> > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
