No, my code is not posted anywhere but I would be glad to email it to anyone interested.
Cheers, Graham -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Phil Genera Sent: October-03-13 6:44 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] A man with two clocks... 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.
