数字钟的精度、稳定度远远超过老式机械钟。在这次设计中，我们目前只采用LED数码管显示秒来显示最高秒为99秒的方式，根据数码管动态显示原理来进行显示，用基于C52单片机、12MHz的晶振产生振荡脉冲。(The accuracy and stability of the digital clock are much higher than that of the old mechanical clock. In this design, we only use LED digital display