51单片机的电子钟程序,带整点报时,可设置时间,若要掉点保存功能.单片机时钟用12M,经测试很准的.-51 Single-chip electronic bell procedures, with the whole point of time can be set-up times, in order to point out to preserve function. Singlechip clock with 12M, have been tested very accurately.

基于LCD1602显示屏和DS1302实时时钟芯片的实时时钟显示程序-翻译 基于LCD1602显示屏和DS1302实时时钟芯片的实时时钟显示程序 Based LCD1602 display and real-time clock chip DS1302 real-time clock display program

1602显示时间，不能自己外部修改时间必须修改程序的方式修改时间(1602 display time, can not modify its own external time, you must modify the way the program, modify the time)