智能万历时钟电路电路CAD课程设计宫一纯

电路CAD

智能万年历时钟电路课程设计报告

宫一纯

摘要

数字时钟是一种采用数字电路技术实现“时”、“分”、“秒”数字显示的计时装置。与机械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，不仅作为家用电子时钟为大家喜爱，而且可以用于机场、车站、码头、体育场、等公共场所，给人们提供了准确的时间。在此基础上，可以加载做出万年历的时钟显示器，对各年份都能显示出来。

万年历数字时钟从原理上来说是一种典型的数字电路。目前，数字时钟的功能越来越强，并且有多种专门的大规模集成电路可供选择。但从学习的角度考虑，在此设计报告中以小规模的集成电路来设计制作万年历时钟。

本文描述了一个基于数字逻辑电路的能实现万年历功能电子时钟的设计，系统由计数器电路、按键校时电路、数码管显示电路等部分构成。计数器电路包含年计数器、月计数器、日计数器、星期计数器等部分，各部分分别完成对“年”、“月”、“日”、“星期”的计数。按键校时电路可分别对“年”、“月”、“日”、“星期”进行单独校时。数码管显示部分能实现时钟日历的功能，能进行“年”、“月”、“日”、“星期”的显示。

未来，万年历将会朝着精准度更高，外观更加美丽，价格更加实惠的方向发展，并且将会出现更多的辅助功能。

关键词时钟万年历数码管数字逻辑

Abstract

The digital clock is a digital circuit technology to achieve hour figures, minute figures and second figures which can show the timing device. Compared with the mechanical clock it retains higher accuracy and intuitiveness, and no mechanical device. At the same time, it has a longer life. So it is used as home electronic clock favorite for everyone, and can be used in airports, railway stations, docks, stadiums, and other public place to provide people with accurate time. On this basis, It can be loaded to make the calendar clock display, and can be displayed for each Year.

In principle, calendar digital clock is a typical digital circuit. Currently, the function of the digital clock is getting stronger, and a variety of specialized LSI can be selected. However, in the learning viewpoint, in this design report we designed calendar clock which based on a small scale integrated circuit.

This paper describes a design based on digital logic circuit can achieve perpetual calendar function electronic clock. The system consists of a counter circuit, key school circuit and digital tube display circuit parts. The counter circuit includes a year counter, the month counter, day counter, week counter part, the various parts of the respective year, month, day, week count. Key timing circuit can timing year, month, day and week respectively. The digital display parts can achieve the function of a clock calendar, and display year, month, day and week.

In the future, the calendar will develop in the direction of higher accuracy, more beautiful exterior and more affordable price. There will be more auxiliary functions.

Keywords Clock Calendar Digital tube Digital logic

目录

一、设计任务与要求 (1)

二、方案设计与论证 (1)

1.方案一 (1)

2.方案二 (2)

3.方案的最终选择与确定 (3)

三、单元电路设计与参数的计算 (3)

1. 单元电路设计过程 (3)

（1）计数器电路 (3)

（2）按键校时电路 (12)

（3）译码显示电路 (15)

2. 设计电路的原理图 (15)

（1）计数器电路 (15)

（2）按键校时电路 (16)

（3）译码显示电路 (16)

3. 单元电路设计与参数计算的小结 (16)

四、protel绘制的总原理图及元器件清单 (17)

1.总原理绘制图 (17)

2.PCB制板图 (20)

3.对于绘图的部分说明 (20)

4.原理图元器件清单 (21)