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.
