多功能数字钟设计与制作本科学位论文.doc

PAGE\*MERGEFORMATI电子技术综合训练设计报告项目名称：多功能数字钟设计与制作班级：自动化2班学号：13220217姓名：郭琦指导教师：李晓英PAGE\*MERGEFORMATII摘要这次课程设计我的题目是多功能电子钟的设计与制作，为了实现电子钟的功能我们选用了石英晶体振荡器、24进制计时器、60进制计数器、显示器、译码器、TTL门电路组成的校时电路。实现了秒脉冲发生电路；电子钟的时、分、秒显示与进位；校时电路。选用74LS160计时，CD4511译码，LED数码显示管显示，74LS00、74LS08、74LS32、74LS04实现校时，晶振发生2HZ脉冲。关键字：数字钟显示校时译码PAGE\*MERGEFORMATIV目录摘要·······························II第一章设计任务和要求·······················11.1设计任务···························11.2设计要求···························1第二章系统设计··························22.1系统设计方案·························22.2系统构思及其工作原理·····················2元器件的选择························33.1CD4511显示译码器······················33.2晶体振荡器··························63.374LS160十进制计数器·····················83.474HC04六反相器························93.574LS20P2-4输入与非门·····················103.674HC084-2输入与门······················123.774HC004-2与非门·······················13单元电路设计························154.1“时”、“分”、“秒”发生电路················154.2“分”、“秒”之间显示“：”电路················184.3译码、显示、计数电路······················194.4手动校时电路·························204.5整点报时电路·························21稳压电源的设计·························225.1设计所需器材和工具·······················225.2设计内容及步骤·························22电路的安装、调试与测试····················256.1电路的安装、调试与测试·····················256.2调试过程中出现问题级解决方法·················25总结与心得体会························277.1数字钟在生活中的应用······················27总结······························31参考文献·······························32附录Ⅰ································33PAGE\*MERGEFORMAT32第一章设计任务和要求1.1设计任务设计一个多功能电子钟1.2设计基本要求（1）数字形式显示时、分、秒，在分和秒之间显示“：”，并按1次/秒的速度闪烁；（2）以24小时为一个计时周期；（3）有校时功能，能够在任何时刻对电子钟进行方便的校正；（4）整点时刻通过扬声器给出提示（发挥部分）；（5）按照以上技术要求设计电路，使其具备所要求的逻辑功能。对设计的电路用Multisim进行必要的仿真、计算参数、安装、调试电路、绘制电路图；第二章系统设计2.1系统设计方案拿到课题后，我们首先将《数字电子技术》中有关本次设计的内容复习了一遍，比如七段译码显示器、计数器、振荡器等等。然后根据设计要求，我去图书馆查阅了相关的资料，对整体框架做了一个初步的了解。做完准备工作后就正式开始设计、仿真及绘图。先将秒、分和时分别设计出来，再进行整体排版、连接。2.2系统构思及其工作原理这次设计让我熟练掌握了课本上的一些理论知识。我选用的是74LS160十进制脉冲计数器、4511BD译码器及一些必要的与门、或门、非门等器件，我使用的振荡器是由555定时器与RC组成的，用来得到1Hz脉冲。数字钟计时周期是24小时，因