数字计步器实验报告无错版.doc

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1、.数字电路课程设计任务书2012－2013学年第1学期　第19周－20周题目数字记步器容及要求〖基本要求〗采用4位数字显示步数，传感器采用水银开关，主人走一步的时候，开关闭合一次〖提高要求〗〖参考原理、框图〗本系统的原理和计数器相同、但是要注意开关的抖动以及信号的整形问题。〖主要参考元器件〗74LS390，74LS48，74LS08进度安排1.仿真、画PCB线路板图、领元器件：2天；2.制作、焊接：2天3．调试：3天4.验收：1天5.提交报告：2012-2013学年第一学期3～7周学生：1004212410042129指导时间：第2～3周指导地点：综合楼508室任务下达2013年1月5日任

2、务完成2013年1月18日考核方式1.评阅□√　2.答辩□√3.实际操作□√4.其它□指导教师小林系（部）主任付崇芳..注：1、此表一组一表二份，课程设计小组组长一份；任课教师授课时自带一份备查。2、课程设计结束后与“课程设计小结”、“学生成绩单”一并交院教务存档。课程设计说明书课程设计名称：数字电路课程设计课程设计题目：数字计步器学院名称：信息工程学院专业：通信工程班级：100421学号：24：**评分：教师：2012年1月18日..摘要本课程设计是设计数字计步器，要求采用4位数字显示步数，传感器采用水银开关，主人走一步的时候，开关闭合一次，同时还应具备清零的功能。为了实现对移动步数的累

3、计，在人体移动时水平位置发生变化从而触动水银开关使电路实现间断性的接触，从而产生脉冲信号使计数电路实现累计，达到记录人体移动步数的目的。在设计该电路时，由于要实现对移动步数的累计故要用计数器来计数。为了清楚的知道自己任何时候走了多少步采用了LED数码管来显示数据并用BCD七段译码器来驱动数码管。故该电路由输入电路，计数电路，译码电路三部分构成。其中，输入电路由一个脉冲计数产生电路和一个置零电路组成；记数电路由两块74LS390和一块74LS08连接而成；译码电路是通过四片74LS247和电阻以及LED管。通过此次试验，更进一步了解什么是电子技术，知道如何设计电路来实现某些具体的功能。此次试

4、验为以后的学习奠定坚实的基础。关键字：记步器，译码，数码管。..目录前言····························································3第1章设计容及要求············································4第2章系统组成及工作原理········································52.1系统组成···············································52.2系统原理································

5、···············5第3章设计方案与原理············································6方案一·····················································6方案二·····················································63.1方案比较，选择·········································7第4章方案比较，选择及单元电路·································84.1单元电路分析···

6、·········································8第5章组装，调试与结果分析······································105.1组装··················································105.2调试与结果分析·······································10总结·····························································12心得体会··························

7、·······························13参考文献·························································14附录Ⅰ······················································15附录Ⅱ······················································