WL1数字电子钟.doc

本科毕业论文（设计） 题 目：WL-1型数字电子钟 专 业：电子设计自动化班级：1班 院 （系）： 电子信息工程学院 完成时间：  WL-1型数字电子钟 摘要 数字钟电路一直以来是一种很经典的数字电路，数字钟的种类更是不计其数，其设计方方案也层出不穷。时间是衡量一切的尺度，所以时间对每个人来说是无比重要的。在当今社会人们更离不开时间，钟、表以及一切可显示时间的事物在我们周围随处可见。随着科技的日星月异的发展，数字电子钟/表以其体积小、重量轻、价格便宜等优点已经取代了大多数古老的机械钟/表。本数字钟采取数字逻辑器件设计方案即使用市场上比较常用的74系列的集成芯片制作。电子钟要有时、分、秒的显示，并且要有整点报时功能。任何一个钟表都会有时间上的误差，所以校时功能是必不可少的功能模块。使用的主要芯片有555定时器、十进制加法计数器74ls160、两输入与非门74ls00、7段数码管译码器7448和7段数码管等。电路的时钟信号产生模块用555定时器完成，记时模块用十进制计数器实现，其显示模块是由7段数码管译码器7448和7段数码管组成。此外该电路还有验灯功能。 关键字: 555定时器/十进制加法计数器/7段数码管译码器/7段数码管/时钟信号/校时/整点报时/验灯 Digital electronic clock Summary ??Digital clock circuit has always been a classic digital circuits, numerous types of digital clock, designed party programs are endless. Time is the measure of all scales, time is extremely important for everyone. In todays society people can not do without, clocks and watches, as well as all display time things around us everywhere. With the technology Xingyue exclusive development of digital electronic clock / watch its small size, light weight, cheap, etc. have replaced most of the old mechanical clock / watch. Take the digital clock digital logic design that the use of the more commonly used 74-series chip production. Electronic clock sometimes, minutes, seconds display, and have a whole hour. Any one of the watches will have time error correction function is essential to the function module. Use 555 timer chip, decimal addition counter 74LS160, two-input NAND gate 74LS00, 7-segment LED decoder 7448 and 7-segment digital tube. Circuit clock signal generation module 555 timer, chronograph module decimal counter display module 7-segment decoder 7448 and 7-segment digital tube. In addition, the circuit also has experience in the light function. Keywords: 555 timer/ the counter of the decimal addition/ 7-segment decoder/ 7