基于单片机的字时钟系统毕业设计.doc

辽东学院毕业论文 基于单片机的数字时钟系统 学生姓名： 学 号： 0943100223 班 级： Z1002 专 业： 计算机应用控制 指导教师： 【摘要】 目前，单片机在朝着高性能和多品种的方向发展的同时也进一步向着CMOS化、低功耗、小体积、大容量、高性能、低价格和外围电路内装化等几个方面发展。 单片机模块中最常见的是数字钟，数字钟是一种用数字电路技术实现时、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，具有更长的使用寿命，因此得到了广泛地使用。 数字钟是采用数字电路实现对时、分、秒，数字显示的计时装置，广泛用于个人家庭，车站，码头、办公室等公共场所，成为人们日常生活中不可少的必需品，由于数字集成电路的发展和石英振荡器的广泛应用，使得数字钟的精度远远超过老式钟表，钟表的数字化给人们生产生活带来了极大地方便，而且大大地扩展了钟表原先的报时功能。诸如定温自动报警、校温度自动打铃、时间程序自动控制、定温度大小限度、自动启闭路灯、定时开关烘箱、通断动力设备，甚至各种定时电气的自动启用等，所有这些，都是以钟表数字化为基础的。因此，研究数字钟及扩大其应用有着非常现实的意义。 关键词：单片机 DS1302 LCD1602 数字钟 温度传感器 【Abstract】 At present, the monolithic integrated circuit while is further also turning toward CMOS, the low power loss and small volume, the large capacity and high performance, the low price and peripheral circuit internal installation toward the directions of high performance and multi-production develop and other aspects develops.What in the monolithic integrated circuit module is most common is the digital clock, when the digital clock is one kind with digital circuitry technical actualization, divides, the installment of second time , compared to have a higher accuracy and intuitive with the mechanical clock, and not mechanism, has longer service life, therefore obtained widely has used. When the digital clock is uses the digital circuitry realizes, divides, second, the timing unit of digital, widely is used in the individual household, the station, the wharf, office and so on public places, become in the people daily life the necessary essential item, as a result of the development and widespread application of quartz of oscillator digital integrated circuit, making the precision of digital clock go far beyond the old style clock and watch, the digitization of clock and watch the livelihood to bring enormously conveniently to the people, moreover significantly expanded the clock and watch original reporting