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数字电路课程设计可预置的定时显示电路
课程设计任务书
学生姓名： 专业班级：
指导教师： 工作单位：
题 目：可预置的定时显示报警电路
初始条件：
具备电子电路的基础知识和设计能力；具备查阅资料的基本方法；熟悉常用的电子器件；熟悉电子设计常用软件的使用；
要求完成的主要任务：（包括课程设计工作量及其技术要求，以及说明书撰写等具体要求）
1、设计定时显示报警电路；
2、预置时间最大30S；
3、数码管显示时间；
4、掌握数字电路的设计及调试方法；
5、撰写符合学校要求的课程设计说明书。
时间安排：
十九周一周，其中2天原理设计，3天电路调试
指导教师签名： 年 月 日
系主任（或责任教师）签名： 年 月 日
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1.电路原理设计····················································
1.1设计要求·····················································
1.2原理框图·····················································
2.芯片介绍························································
2.1 74LS192······················································
2.2 74LS00·······················································
2.3 74LS48·······················································
2.4 555定时器····················································
3.单元电路设计····················································
3.1 递减计数器··················································
3.2 置数控制电路················································
3.3 时钟信号控制电路············································
3.4 译码显示电路················································
3.5 报警电路····················································
3.6 秒脉冲发生电路··············································
4.电路图设计······················································
4.1 电路原理图··················································
4.2 电路原理介绍················································
5.电路仿真························································
5.1 绘制电路图··················································
5.2 元件设置····················································
5.3 仿真结果····················································
6.制作电路························································
6.1 生成材料清单················································
6.2 焊接电路····················································
7.课程设
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