1602LCD+89C51+DS1302时钟实验,通过键盘可以设置时间，通过lcd显示时间，没有掉电保持。,1602LCD+ 89C51+ DS1302 clock experiments, the keyboard can be set through time, through the lcd display time, no brown-out to maintain.

89C51系列单片机和DS 1302时钟芯片组成的电子时钟，LCD1602液晶屏做显示，适合初学者参考！-89C51 microcontroller series DS 1302 clock chip composed of electronic clock, LCD1602 LCD display to do, suitable for beginners reference!