If I were you I would spend a little bit of time to work out how a simple WWV transmitter can be made. It really is only a small step to go from the point where you are now. It's a beautiful clock and if you have a GPS to WWV converter (RF), the clock can be used globally and is still doing the thing it was designed for, it's just that it is a local WWV station :-).
They probably use AM or SSB, I drafted a (very) simple schematic just to show you how simple this can be done. Sure you will have to work out the rest of it, but this can be used as a very basic AM WWV transmitter. SSB would be quite simple as well by multiplexing the 100Hz and 1000Hz tones at the carrier frequency, effectively omitting the carrier itself this way. http://xiac.com/Images/WWV_AM.jpg Michel On Feb 2, 4:24 am, Mitch <[email protected]> wrote: > Works! Thanks for the help and comments. > > It didn't work yesterday because I used a data array from a simple Arduino > sketch that I found on a forum. Most of the elements were in the wrong > positions, maybe it was for a different IRIG spec. It doesn't seem to > matter if the first frame at 0 seconds (the hole) is 1.03s, not sure why > they did that because it shifts everything else forward by 30 milliseconds. > The GC-1000 syncs equally well with and without that delay. > > It takes four data frames to set the time. Updating the time took five > frames the one time I checked, not sure why. Maybe it was because the same > frames were repeated and the time difference was so great. > > Next I'll work with a GPS receiver and the Arduino's C++ Time.h library to > get everything working. I will use an old RS-232 connector to hold both > jacks for the GPS, and also for a mini-usb connector so that the Arduino > sketch can be updated without opening the case. Only four wires will be > connected to the clock, and the modification is easily reversible. > > A low power WWV transmitter would be great. That's beyond my skill level, > so this will suffice unless someone else designs that part. > > Mitch -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
