Clock register using relays.
(For 6-digit clock)
･Top left lamp = to input minute counter
･Top center light = to hour counter input
･Top right lamp = Second counter and clock power supply
･Bottom left lamp = carry output for seconds counter
･Bottom right lamp = minute counter carry output
･Top button = S button
･Bottom button = M button
The M button is used to change modes. Each press of this button changes the mode from normal mode to seconds reset mode, hour setting mode, and minute setting mode.
･Normal mode: The clock is displayed as usual.
･Seconds Reset Mode: Pressing S button shuts off power to the seconds counter and clock. The seconds display setting is completed by adjusting the seconds to 0 seconds of the reference time and releasing the button.
･Hour setting mode: Press S button to count up the hour digits. At this time, pressing and holding down the button shifts to automatic count-up.
･Minute setting mode: Press S button to count up the minute digits. At this time, pressing and holding down the button shifts to automatic count-up.
This time setting procedure was created with reference to Casio watches.
