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 to display the second highest seconds for 99 seconds, according to the principle of dynamic display of digital tube to display oscillation pulse with C52 microcontroller, based on 12MHz crystal.)