Hi Jason, Nice work. Clean install of the hardware, wish mine was as neat:
http://www.nerdhouse.org/projects/timeserver/ I have a ghost image for my CF card there with FreeBSD 7 (I think). A little old since I haven't looked at it in over a year, but it's there for anybody to take to get a jump start. I noticed my net4501 was a little flaky if plugged into the wall outlet. The thing would lock up sometimes after 10 minutes, sometimes after 10 days. It was much more stable if plugged into a UPS that I assume filtered the output. My GPS board is one I custom designed for another project. Two serial ports, one for NMEA and the other for Trimble's proprietary binary format. This is a Trimble Lassen IQ module with two output ports on it. Your motherboard looks just like mine but is missing a lot of parts. Looks like you have only one ethernet port vs 3 on mine, one transciever chip vs 3 on mine (I assume these are ethernet transciever chips), no card slot on the right, etc. Is this a standard offering from Soekris? -Bob, N3XKB On Sat, Oct 30, 2010 at 5:09 PM, Jason Rabel <[email protected]>wrote: > Just thought I would share a quick pic of my latest home built NTP server. > I'm proud of it, I don't care if you aren't... :P > > http://www.rabel.org/pics/Net4501-2.jpg > > It is about as simple as one can get... Net4501 w/ Motorola Oncore M12+T.. > all direct wiring, no extra components really needed > (except one diode). > > The M12+T I got from fluke.l on ebay... Took a while getting here (~ 2 > weeks) but well worth the wait. > > I used a low-voltage drop diode to get the 3.3v to ~3.0v for the GPS power > (seemed easier than trying to find a 3V voltage regulator > or building a huge circuit with one of those adjustable models), the 5V > goes to the antenna... TX, RX, and PPS are wired direct. > Mine didn't have the second serial port RS232 converter, I manually wired > across the chip location to get the TX & RX pads. > > I used a connector on the GPS so I could swap it out easier, after > soldering I put some liquid electrical tape to hold things in > place. I got it from mouser (they had a few types), but the part # I used > is M50-3120545 > > Drilled the holes for the GPS on a friend's vertical mill. > > Still haven't decided if I want to mess with clock crystal or not. Also not > sure if I want to wire up extra status LEDs for NTPns. > It's so clean inside that I don't want to mess it up with more wires and > components and such. > > Running PHK's NTPns on FreeBSD 6.3 (and old image I made years ago, but it > still runs great). > > NOTE: If you are planning on buying a M12+ on eBay, the model's from > rbm3695 are NOT the timing models. In the part# P273T12N16, the > "N" denotes navigation, the timing models have a T there. I got one to play > with while waiting for the real timing one from > fluke.l... They *do* have a PPS and you probably can use it for NTP timing > purposes, but you have to be careful about the commands > you send to it. I'm not 100% sure but either some TRAIM or auto-survery > command will disable the PPS... NTPns has commands > hard-coded so you would have to modify it before building an image... With > regular NTP if you turn TRAIM off in the config and set a > mode where it uses the position in the file then you still get the PPS... I > need to get me a 3V-RS232 converter so I can interface > it with a regular PC and tinker some more... > > I now have SIX network time servers... and only four PCs on my network... > lol... > > I would love to find some more Net4501's cheap... I have a net4511 that I > might try next... It only has one physical serial port but > so much of the layout is identical to the net4501 that I'm sure if I trace > back far enough I can find where that second serial port > is hiding and solder on the TX & RX wires... While I'm thinking about it > I'm going to burn another image of nanobsd and boot this up > to see indeed the OS sees a second serial port. > > > _______________________________________________ > 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.
