HAQ Clock v2.0
https://www.youtube.com/watch?v=j9DEfYbgUA8High Accuracy Quartz Clock v2.0
A new clock circuit using an Arduino with code that I have written.
It has much better accuracy than the previous DIY clock as shown by the Rigol DS4000 oscilloscope: ~ 21uS in a day, which means less than 0.01 seconds per year (using a GPSDO).
