毕业设计数字电子钟

数字电子钟设计与制作

通用模型

摘要

尽管单片机以及功能更加强大和各种专门的时钟电路在现时代已经到处可见，却仍然有不少老牌的数字时钟电路正在许多原来的产品中继续使用和运行，本套件采用一只PMOS大规模集成电路LM8560(TMS3450NL)和四位LED显示屏，通过驱动显示屏便能显示时、分。震荡部分采用石英晶体振时基信号源，从而保证了走时的精度。本电路还提供了定时报警功能，它定时调整方便，电路稳定可靠，非常适合广大电子爱好者装配使用。本电路还扩展成定时控制开关等功能。LM8560是曾经是我国专业国营工厂制作数字钟和定时收音机等等的应用电路，具有性能稳定，走时功能、定时功能和睡眠功能。能够使用50或60HZ频率作为数字钟的基准频率。真正是风靡一时！

这里提供的是可以交流供电、也可以使用直流供电的应用电路。作为直流供电的关键是需要一个高精度的基准频率，这里用30720HZ廉价晶体，与CD4060数字电路组成了可以提供60

HZ电子煎药壶基准频率的电路。需要注意的是：该集成电路的专用显示屏幕属于双阴极供电的类型，比较特殊而且无法与其他电路的屏幕通用，因此，需要保证它们的驱动波形是非常对称的。这里使用了CD4013电路进行倒相，由2只C9013轮流向屏幕的两个阴极供电。交流供电时，如果遇上交流停电，就需要进行预付费智能电表“掉电保护”，由干电池保持时钟继续走时，同时，为了节约电池的电能，由一只三极管C9013自动把显示屏幕的供电切断，实现了交流掉电时自动消隐。

关键字：LM8560 CD4060 石英晶体振荡走时功能定时功能放血刀睡眠功能

Digital electric clock design and production

Although microcontroller and function more powerful and various special clock circuit in modem everywhere, but still has many veteran digital clock circuit are many of the original products of continue to use and run by a PMOS, this package LM8560 TMS3450NL (lsi) and four LED display screen, through the driver can display, points. Using quartz crystal oscillator concussion part when the yankees signal, so as to ensure t

he accuracy of walking. This circuit has provided regular alarm functions, it is easy to adjust timing circuit is stable and reliable, and suitable for the use of electronic assembly lovers. This circuit has expanded into timing control switch etc. Function. LM8560 was specialized in making digital clock state-run factories and timing circuits, the application of radio, stable performance, when the function, function and sleep function. Can use 50 or 60HZ digital clock frequency as the benchmark frequency. Real is the rage!

磁铁块Here is the ac power, also can use dc power supply circuit applications. As the key to dc power supply is a high frequency, with the benchmark 32768HZ cheap crystals, here CD4060 and digital circuit components can provide 60HZ benchmark frequency circuit. Note: the integrated circuit for the display screen belongs to double the cathode is special type of power supply, and the screen with other circuit, therefore, it is necessary to ensure general they drive waveform is very symmetric. There used CD4013 circuit, only by 2 pour C9013 turns to screen the two cathode power supply. Ac supply, if meets the need for communication blackout, "protection", keep walking by the clock to dry, and at the same time, in order to save the energy, by a battery C9013 triode automatically cut off

the power supply display screen, communication power automatically vanishing

Key words：LM8560 CD4060 Quartz crystal oscillation When the function Time function Sleep function

引言： - 1 -

第一章软件概述 - 1 -

1.1 Protel 99概述 - 1 -

1.1.1电路板设计的基本步骤 - 1 -

1.1.2原理图的设计步骤 - 2 -

1.1.3印制电路板（PCB）的布线流程 - 3 -

第二章整机设计 - 5 -

2.1数字电子钟的组成框图 - 5 -

2.1.1基本组成框图 - 5 -

2.1.2具体组成框图 - 6 -

2.2采用的集成电路介绍 - 6 -

2.2.1 LM8560的功能特点 - 6 -

2.2.2 CD4060的功能特点 - 7 -

2.3电路设计与系统各模块的原理实现 - 9 -

2.3.1总体设计简介 - 9 -

2.3.2工作原理 - 9 -

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毕业设计 数字电子钟

毕业设计数字电子钟