变调门铃设计.docx

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1、模拟电路课程设计变调门铃年级09级学院信息科学与技术学院专业自动化组长陈曦（09382045）组员陈健（09382043）周永强（09382047）苏海立（09382040）肖胜忠（09382039）完成时间2010年12月30日12概要为培养运用基本知识进行简单电路设计的能力，扎实基础理论，我们现在进行模电课程设计。我们组设计的是变调门铃。所谓变调门铃就是当客人按一下开关后，门铃以一固定频率（800Hz）响两秒，然后自动变为另一个固定频率（1000Hz）响两秒。设计这个电路时，我们根据从稳定性、可靠性、实用性、经济性选择电子元器件，设计适合的功能电路。我们采用了三片IC器件55

2、5，五个三极管及若干电阻电容等元件，焊接此变调门铃电路。该变调门铃有以下优点：1)使用555电路实现延时和振荡信号产生，延时长短精确易控，振荡信号稳定易调。2)巧妙地利用三极管饱和和截止特性实现电子开关功能和逻辑非功能，简单方便，易控可靠。3)该变调门铃电路使用较少的器件，较好地实现变调门铃功能，经济实用。4)该变调门铃电路使用PCB板制作，集成度高，体积小，十分美观。5)开关未按下时，所有的555电路均处于复位状态，耗能少，绿色环保。12目录1　设计内容及要求····························································

3、41.1　设计目的及主要任务···················································41.2　设计思想·····························································42　变调门铃电路各模块的工作与设计原理及仿真··································42．1　延时模块···························································42．2　信号产生模块······················

4、·································52．3　其他模块···························································62.4元件参数选择·······················································72.5实验仿真···························································73　实物制作·····················································

5、·············93.1PCB板制作···························································93.2电路的焊接··························································10123.3硬件调试····························································104　心得体会·································································

6、105　参考文献·································································116　附录·····································································116.1组员分工···························································116.2电路元器件明细表···················································111.设计内容及要求1.

7、1设计目的及主要任务设计目的:设计12的变调门铃电路，安装在门外，当客人来了，可以按一下变调门铃开关，该变调门铃发出声音提醒主人有客人来了。设计任务:（1）通过设计过程中对问题的提炼和解决。（2）提高小组成员之间通力合作的自主、协作性学习方式的能力。（3）掌握电子电路的一般设计方法。（4）锻炼我们的学习能力和动手能力。（5）学会撰写课程设计总结报告。（6）培养严肃认真的工作作风和严谨的科学态度。1.1设计思路本次设计要求基本完成当按下开关后门铃先发出频率为f1的音频声，经过T秒后