GPS Clock - a GREAT addition to my amateur radio shack
For GPS Clock
All of the controlled clocks in my home are of the Atomic clock variety that receive a signal from WWVB on 60 kHz from Fort Collins, Colorado: https://www.nist.gov/pml/time-and-frequency-division/radio-stations/wwvb . I live in SC, so the only way I can reliably sync them is to move them to the Western side of my house near a window at night, which I do weekly. It is wonderful to have a clock where I just need to place the GPS puck outside my window, and be assured of the 100 ms accuracy every split-second of the day. I purchased the clock fully assembled. It's options allow customization of the clock in terms of LED intensity, Time Zone, Daylight Savings Time, 12 vs 24 hr, display of the tenth's of seconds display, and more. There is no significant documentation provided in the package, but it is on the Tindie website. Setup is fairly intuitive, though. No communication was necessary between me and the seller. Shipping was very prompt, and packaging was good. I realize that this began as a very simple project, but it definitely has a permanent place in my ham shack. - 73 de JIM N2ZZ
Response from Geppetto Electronics | June 1, 2017
Thank you for your kind words!
I do have to point out that I've had to revise the specifications of the clock's accuracy down to 200 µs instead of 100 µs. The code in the interrupt handler for the PPS took longer than I had estimated, but the 200 µs figure is the worst-case accuracy measurement.