万年历数字钟是一种用万年历时钟芯片实现年、月、日、时、分、秒计时，并通过单片机处理后送给显示芯片显示的装置，与机械式时钟相比具有更高的准确性和直观性，且具有更长的使用寿命。本系统还可以扩展为可调的自动开关,对家电对用电设备进行控制,笔者在随后改制成为可调时的自动断电的供电系统.-Calendar Digital Clock is a clock chip using calendar year, month, day, hour, minute, second time, and through single-chip processing to the display chip display devices, and mechanical clock has a higher accuracy compared to and intuitive and has a longer life. The system can also be extended to an adjustable automatic switch, household electric appliances to be controlled on the electrical equipment, and the author in the subsequent restructuring has become an automatic adjustable power supply system.