实现分频和对音乐的播放，本文件实现对诺基亚铃声的播放，需要配有电路板-To carry out the frequency and music play, this document realization of nokia ringtone playback, need is equipped with circuit board

89C52，DS1302，1602液晶做的多功能音乐播放器,可以用流行的MP3做闹钟铃声。-89C52 + DS1302 +1602 LCD multi-function music player to do, you can do with the popular MP3 alarm clock ringing.

基于51单片机的闹钟程序 可12864显示图片，可播放音乐，可以设置时间，闹钟，铃声。 采用任意位置反白 清楚显示选择的位置-Based on 51 single-chip clock 12864 program can display pictures, play music, you can set the time, alarm, ringtones. Highlight adopt any position clearly shows the location of choice

蜂鸣器播放单音铃声,基于AVR ATMEGA16-Buzzer playing monophonic ringtones