带有万年历的数字钟，1602显示，51单片机，PCF8583时钟芯片-Digital clock with calendar, 1602, 51, PCF8583 clock chip

PCF8583的万年历程序，可以显示年月日时间，简单设置闹铃，日程的程序。-PCF8583 calendar program that can display the date time, simply set the alarm, calendar program.