By the way, you need not use a USB serial adapter. Several folks are doing PPS on the gpio pins.
Take a look here https://github.com/davidk/adafruit-raspberrypi-linux-pps And here http://www.frambozenbier.org/index.php/raspi-community-news/4439-george-lu-on-ntp-pps On Oct 16, 2012, at 22:03, x...@darksmile.net wrote: > The miniITX mobos are quite impressive. > There is no argument there. > > However, My simple idea was this: > > Since I want to keep time at 3 separate locations > and wanted stratum 1 NTP, I didn't want overkill. > > Actually my reason for 3 different locations is simple: > Internet is flakey some places and sometimes just down. > I'd like to have correct time no matter what > happens to the internet. > > The other thing I want to do is create a very small footprint > NTP server that basically looks like 3-4 cartons of > cigarettes stacked on top of each other. > > Maybe even have the power supply on the bottom > of the stack. > > I don't know if I'll be able to do this > but this is the general idea. > > I think maybe something like this: > > GPS Receiver + antenna connector > ----------------------------------- > Interface board > ----------------------------------- > CPU main board > ----------------------------------- > Shield board (mostly ground plane) > ----------------------------------- > Power supply > ----------------------------------- > > If I could put this in a nice aluminum > case I think it would look beautiful. > > -G > > Quoting Chris Albertson <albertson.ch...@gmail.com>: > >> On Tue, Oct 16, 2012 at 4:37 PM, Hal Murray <hmur...@megapathdsl.net> wrote: >>> >>>> One does NOT need a dedicated server for NTP. NTP can run on a linux >>>> system >>>> that is also a web and mail server or on e linux desktop system that you >>>> use for web surfing and web browse ring, just as long as the box stays >>>> running and you don't turn it off. >>> >>> It's been discussed before, but probably worth repeating. >>> >>> Don't overlook the cost of power. If you have an old power-hungry CPU that >>> you use for mail and web, leaving it on all the time can cost a lot. >> >> Yes. You are right. that is why I posted a like to this >> http://www.newegg.com/Product/Product.aspx?Item=N82E16813121442 >> this board uses very little power and as you say will pay for itself >> quickly. You can reast your hand of the heat sink and notice there is >> no fan. It uses just a few watts. and can run VMware, and multiple >> servers >> >> >>> The >>> payoff time for replacing it with a low power system can be as low as a year >>> or two. >>> >>> >>> -- >>> These are my opinions. I hate spam. >>> >>> >>> >>> >>> _______________________________________________ >>> 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. >> >> >> >> -- >> >> Chris Albertson >> Redondo Beach, California >> >> _______________________________________________ >> 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. _______________________________________________ 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.