89C51单片机号音自动播放器的设计，笔者利用AT89C51型单片机和LM386型音频功率放大器构成了自动计时和号音播放器，成本低，效果好，值得推广-No. 89C51 single-chip audio jukebox design, this writer using AT89C51-type single-chip audio power amplifier and the LM386-based automatic timing and constitute a sound No. Player, low cost, effective and worthy of promotion