On this page, I will introduce the PIC controled circuit which is the heart of Ultra High Accuracy Digital Clock.
For the details of the clock, refer to "Ultra High Accuracy Digital Clock version 2".
As for PIC, PIC16F873 is used in the relation of the input-output port.
Also, to make a circuit compact, CPLD is used for the peripheral.

Hardware			Software
	Circuit drawing Pattern drawing Circuit explanation Parts explanation			Flow chart List Processing explanation Operation confirmation

As for above JAVA applet, refer to "Digital clock Applet (Ver2)".