说明：  本文介绍的数字钟是一种单片机技术实现时、分、秒计时的装置，与机械式时钟相比具有更高的准确性和直观性，且无机械装置，具有更更长的使用寿命，因此得到了广泛的使用。
(This article describes the digital clock is a single-chip technology, the minutes, seconds, timing devices, and mechanical clock compared to more accurate and intuitive, and no mechanical device, with a more longer life, so has been widely used.)