辅导交流
地 址:西安市科技路JR电子科技
3127247860:点击这里给我发消息
2733195595:点击这里给我发消息
电 话:13649286003
邮 箱:jr_dz_kj@163.com
当前位置:首页主页 >> 论文展示 >>
365秒计时器电路的设计
作者:admin   发布于:2014-02-27 15:54    文字:【】【】【
摘    要
随着社会文明的进步和科学技术的发展,先进的电子技术在各个近代学科门 类和技术领域占有不可或缺的核心地位。在我国现代化建设的发展进程中,数字 电子技术在国民经济和科学研究各个领域的应用也越来越广泛。而计时器恰恰是 数字电子技术的一个重要组成部分,计时器是一个用来实现计数功能的时序部分, 它不仅可以用来计脉冲个数,还常用来做数字系统的定时、分频,执行数字运算, 以及其他特定的逻辑功能等等。
本文主要介绍 365 秒计时器电路的设计。首先介绍了设计方案,本文没有使
用单片机,而是用数模电路技术来制作硬件电路,可以对以前学过的数字电子技
术和模拟电子技术加以巩固,同时增强动手能力。其次介绍了原理图的设计,本
文用了 Altium Designer 来做原理图的设计,而没有用版本较早的 Protel99Se。至
于原理图的仿真,则使用了 Multisim,因为大三做电路设计时用到过这个软件,
对它的功能和用法有一定了解。然后介绍了 PCB 的设计,包括如何布线,如何放
置元器件能使板子利用率最大,干扰最小等等。最后就是安装,焊接,调试和总
结了,在这里介绍了制作过程中的诸多问题,和自己解决的方法,还有最重要的
就是对整个毕业设计的总结,里面包括自己一些深刻的体会,和对电子行业未来
的展望,以及对作为一个电子从业者应具备的认真严谨态度的认识。
 
 
关键词:计时器      PCB 设计    电子技术

 
 
 
 
ABSTRACT
 
ABSTRACT
With  the  development  of  social  civilization  and  progress  of  science  and technology, advanced electronic technology plays an indispensable core status in the modern  science  and  technology.  In  the  development  process  of  our  country modernization, the application of digital electronic technology in national economy and scientific research in various fields more and more widely. While the timer is an important part of digital electronic technology, the timer is used to achieve a counting function timing part, not only can it be used to gauge the pulse number, timing, frequency is often used in digital system, implementation of digital computing, and other special logic functions.
This  paper  mainly introduces  the  design  of    365  seconds  timer  circuit.  First
introduces the design scheme, this paper does not use the computer, but with digital
and  analog  circuit  technology  to  make  the  hardware  circuit,  digital  electronic
technology to previously learned and analog electronic technology to consolidate, and
enhance the practical ability. Secondly introduces the schematic design, this paper uses
Altium  Designer  to  design  schematic,  without  using  an  earlier  version  of  the
Protel99Se. As for the simulation diagram, use Multisim, use this software for three
circuit design, the function and usage of some understanding. And then introduces the
design  of  PCB,  including  how  to  wiring,  how  to  place  components  can  make
maximum utilization of minimum interference of board, etc.. Finally is the installation,
welding,  debugging  and  summarize,  here  introduces  many  problems  in  the
manufacturing process, and solve their own, there is the most important thing is for the
the graduation design summary, which includes some of his profound experience, and
prospects for the future of electronic industry, as well as the understanding of the
electron as a practitioner should have a serious attitude.
 
 
Keywords:    timer    PCB design      Electronic Technology

目    录
 
第一章    绪论 .................................................................................... 1
1.1    计时器的介绍 ......................................................................... 1
1.2    主要应用领域 .............................................................................. 1
1.3    本文的主要设计内容和安排 ..................................................... 1
第二章    方案设计 ..............................................................................3
第三章    硬件电路设计 .....................................................................5
3.1    总原理图 ..................................................................................5
3.2    主要器件介绍 .............................................................................5
3.2.1    NE555 芯片 ..........................................................................5
3.2.2       74LS160 芯片 ................................................................. 8
3.2.3       74LS48 芯片 ...................................................................0
3.2.4    七段数码管 ..........................................................................14
3.2.5       74LS08 芯片 ...............................................................15
3.2.6       74LS20 芯片 .................................................................15
第四章    原理图仿真 ......................................................................19
4.1 Multisim 简介 ...........................................................................19
4.2 电路性能仿真 ............................................................................27
4.2.1    参数设置 ...........................................................................28
4.2.2    仿真波形 ..........................................................................29
4.2.3    仿真结果分析 ..............................................................29
第五章    PCB 的制作 .......................................................................31
5.1 Altium Designer 简介 .............................................................31
5.2 绘制 PCB 板 ...........................................................................32
第六章    安装,焊接,调试......................................................... 41
6.1 安装 ......................................................................................... 41
6.2 焊接 ........................................................................................ 41
6.3 调试 ........................................................................................41
第七章    设计心得体会 ................................................................ 43
致    谢 ........................................................................................... . 45
参考文献 ................................................................................. ... 47


附件一
上一篇:没有了
下一篇:超声波测距仪设计与实现
友情链接