51单片机实现的1602闹钟万年历 对与学习液晶的人很有帮助-51 MCU' s clock calendar for 1602 were very helpful and learning LCD

用89C52+DS1302+1602液晶做的多功能音乐播放器（多级菜单），可设闹钟，附Proteus图与源程序-89C52+DS1302+1602 LCD multi-function music player (multi-level menu), can set the alarm clock attached the Proteus diagram with source