Accurate PIC18F25K20-based timekeeper referenced to an atomic clock
This PIC18F25K20-based clock uses radio receivers to synchronize the time with that from the GPS satellites or the DCF77 transmitter, both of which are referenced to atomic clocks.
Very accurate clock referenced to an atomic clock
This project is a clock with radio receivers which can receive the exact date and time from the DCF77 time signal transmitter or the UTC from the GPS satellites and display it on a 128×64 pixel graphic display. DCF77 transmitter and GPS is synchronized to an atomic clock. So basically this project can “connect to” an atomic clock.
This project is an open design: open hardware and open source software.