在车站、码头等一些公共场所,人们常为相距不远的几个时钟指示不一而困惑。本文介绍一种新颖的子母时钟系统,它在一个由8031单片机构成的母钟控制下,用分散在各处的子钟同时显示母钟指示的时间。该系统具有精度高、体积小、功耗低、传输线少、抗干扰能力强以及子钟的数量不受限制等优点,有一定的实用价值。一、系统硬件及基本原理 In some public places such as stations and docks, people are often confused by the instructions of several clocks not far away. This article describes a novel daughter clock system, which in a 8031 ​​MCU parent clock control, with scattered around the clock at the same time show the mother clock indication time. The system has the advantages of high precision, small size, low power consumption, less transmission line, strong anti-interference ability and unlimited number of sub-clocks, and has certain practical value. First, the system hardware and basic principles