A self adjusting clock system operable to provide a uniform time display on clocks throughout a facility including a master time-keeper, a plurality of slave time-keepers, and a time-keeping correction apparatus for correcting time of the slave time-keepers in accordance with the master timekeeper. The master time-keeper keeps the correct time and is operable to generate a master signal representative of a time correction. This master signal is then received by the time-keeping correction apparatus and analyzed in combination with other applicable information. The time-keeping correction apparatus supplies a slave correction signal to the slave time-keepers. The slave time-keepers independently keep and display the slave time-keeper time and respond to the slave correction signal to correct their slave time-keeper time when it deviates from the correct time kept by the master time-keeper. The time-keeping correction apparatus is operable to receive the master signal from the master time-keeper, analyze the master signal and supply the slave correction signal to the slave time-keepers.

An improved programmable timer unit can be incorporated into a remote control management system to actuate loads according a user's defined schedule without relying upon any additional supplementary device for data communication. The timer unit includes an input section for selecting a switch address of any switch employed in the system and a schedule specifying the actuation time and the control code for actuation of the target load or loads. A processor makes up a load management program based upon the schedule and executes the program for control of loads. Thus, the timer unit can alone emulate any one of the switches for controlling loads without relying on additional external device for the data communication.

A timepiece comprises a standard time clock for counting standard time and means for calculating daylight saving time by adding a predetermined time correction value to the standard time when judging that the standard time is within the period of daylight saving time. When a time input for setting the timepiece is after a daylight saving time starting time as expressed in the standard time and before a daylight saving time starting time as expressed in daylight saving time, the timepiece corrects the input time by adding the time correction value thereto and sets the corrected time as daylight saving time for the standard time clock.A monitoring camera device comprises the timepiece. Time data output from the timepiece when an image is captured is added as image capturing time data to image data obtained by capturing the image.

A power-generation detection circuit for detecting a power-generation state by an AC voltage supplied from a power-generation device including a capacitor, and switching element, a resistor, and an inverter circuit which controls the charging of the capacitor by a power-generation device. The switching element is switched by the AC voltage from the power-generation device. The voltage of the capacitor is detected by the inverter circuit thereby performing power-generation detection.

An electronic sunrise-dependent timepiece, comprising an oscillator circuit for generating clock pulses at a predetermined frequency and a clock circuit coupled to the oscillator circuit for generating minutes and hours and calendar data. An offset correction circuit coupled to the clock circuit and being responsive to a current value of calendar data adds a respective offset to the minutes and hours data so as to generate a sunrise-dependent time of day for display on a suitable display device.