A Radio Controlled Clock. But this clock works with Japanese readio clock system.
http://www.hobby-elec.org/e_pic6_d.htm
an LED matrix is used for the display of a day of the week
http://www.hobby-elec.org/e_pic6_e.htm
The calendar and the time informations are obtained from the circuit though RS232C interface
http://www.hobby-elec1.org/e_pic6_h.htm
digital clock that operates with very high accuracy by synchronizing to the color burst signal in the television picture signal
http://www.hobby-elec.org/e_clock0.htm
digital clock with very high accuracy which is controlled by PIC.
http://www.hobby-elec.org/e_clock_v2.htm