[time-nuts] A man with two clocks...

[Phil Genera]

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" <kuzetsa at gmail.com> 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" <CollinG at navcanada.ca> 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: david-taylor at blueyonder.co.uk
> >> .
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