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 view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/vggZ7bZKyz8J. 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.
