Master Clock MK2 Auto Tune Display test

When the DCF77 signal fails the Master Clock reverts back to Quartz crystal control. The crystal has a 16MHz frequency and is not very good at keeping time. Udo Klein's DCF77 library now includes "Auto Tune". The DCF77 signal is used to tune the Quartz crystal frequency over a number of days. The Auto Tune'd Quartz crystal accuracy and frequency is shown on the bottom of the LCD display. With auto tune in operation even if the DCF77 signal is absent for long periods of time the clock will stay in sync. This is very important for my slave clock control.

Видео Master Clock MK2 Auto Tune Display test канала Brett Oliver