数字电子万年历 时钟电路设计 毕业设计.doc

摘 要 在当代繁忙的工作与生活中，时间与我们每一个人都有非常密切的关系，每个人都受到时间的影响。为了更好的利用我们自己的时间，我们必须对时间有一个度量，因此产生了钟表。钟表的发展是非常迅速的，从刚开始的机械式钟表到现在普遍用到的数字式钟表，即使现在钟表千奇百怪，但是它们都只是完成一种功能——计时功能，只是工作原理不同而已，在人们的使用过程中，逐渐发现了钟表的功能太单一，没有更大程度上的满足人们的需求因此在这里，我想能不能把一些辅助功能加入钟表中去。在此设计中所设计的钟表不但具有普通钟表的功能，它还能实现个额外的功能：温度测量校准功能 Abstract In contemporary work and busy life, time and every one of us has a very close relationship, each person affected by time. In order to better use of our own time, we must have a measure of time, resulting in a watch. Clocks is a very rapid development, from the beginning of the mechanical watches that is now widely used in digital watches, clocks, even though it is now unusual, but they are just completed a feature - a time function, working principle is different in peoples use of the process, and gradually found a single watch function too, there is no greater demand to meet the people. So here, I would like to be able to watch a number of auxiliary functions to join in to. In the design of the watches designed not only has the general functionality of watches and clocks, it can achieve an additional function: temperature measurement. And digital electronic calendar using intuitive digital display, you can also display year, month, day, weekdays, hours, minutes, seconds and temperature information, but also time-calibration functions. AT89C52 single-chip microcomputer of the circuit as the core of power in small, low-pressure in the work of 3V, voltage can be selected 3 ~ 5V supply voltage.. Have a high relevance. Key words: single-chip microcomputer AT89C52; calendar; DS18B20 temperature sensor; clock chip DS12C887 目 录 绪 论 1 1. 方案设计 2 1.1 课题开发背景 2 1.2 设计的目的 2 1.3 设计的意义 3 1.4 国内外发展 3 1.5 总体方案论证与选择 3 1.6 模块方案论证与选择 4 1.6.1 时钟模块 4 1.6.2 键盘模块 4 1.6.3 显示模块 5 1.6.4 温度传感器模块 5 2. 系统总体设计 6 2.1 电路设计框图 6 2.2 系统硬件概述 7 2.3 单片机AT89C52功能介绍 7 2.4 时钟模块设计 13 2.5 温度采集模块 16 2.6 显示模块 22 2.7 电源电路部分 26 2.7.1 电路组成 26 2.7.2 三端稳压集成电路7805 27 2.8 键盘部分 28 2.9 报警模块 30 2.9.1 报警电路 30 2.9.2