简易电子琴课程设计

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1、课程设计报告课程设计名称：模拟电路课程设计课程设计题目：简易电子琴学院名称：信息工程学院专业：电子信息科学与技术班级：110431班学号：11043128姓名：谢辉评分：指导教师：杨素华2013年11月17日摘要随着社会的进步发展，音乐逐渐成为我们生活中很重要的一部分，而乐器更是应用广泛，几乎在更大软件均有乐器制造。所以本文就设计了一个简易电子琴。电子琴是现代电子科技与音乐结合的产物，是一种新型的键盘乐器，在现代音乐中扮演着重要的角色。本实验着重讲述了如何使用555制作简易电子琴产生8个不同音阶控制电路的设计，当操作者按下8个按键即可产生8种不同的音调，然后通过LM3

2、86功率放大器进行音调放大。本实验完成了简易电子琴的设计和调试，其基本的设计思路是采用了模块设计：实现基本要求时只要用555构成多谐振荡电路，通过不同的电阻（用变阻器调节成8个所需电阻）来获得不同的频率，再经过LM386放大所以发出不同的音调。如果要实现提高要求则需要在基本要求上添加一部分电路即可。通过开关控制不同的电阻所对应的振荡电路的通断调节相应频率大小，从而产生不同的音调。当然在这之前要事先查阅资料，再查阅各个芯片的引脚功能的各个参数，同时还要了解震荡电路，与其产生震荡的原理，在根据震荡电路计算出电阻值，以便选择合适的电阻值，这些都是课前准备。测试电子琴要一步一

3、步，首先是震荡电路的线路测试，尽量消除噪声，使音质能够清晰，这样电子琴就做成了。通过本次电子课程设计，不仅掌握了简易电子琴的设计，更重要的是提高了动手实践能力，从搜集各方面资料到检查电路，充分锻炼了分析问题以及解决问题的能力。关键字：电子琴，NE555，LM386，声调目录前言································································1第一章设计内容及要求··········································2第二章系统组成及工作原理··················

4、··················32.1系统组成···················································32.2工作原理···················································4第三章方案比较·················································83.1方案一······················································83.2方案二··························

5、····························93.3方案三·····················································113.4方案分析与比较·············································12第四章参数计算、器件选择····································124.1参数计算···················································124.2器件选择·······················

6、····························13第五章实验、调试及测试结果分析····························145.1调试·······················································145.2测试结果与分析·············································18结论······························································20参考文献·······················

7、··································21附录一····························································22附录二····························································23前言电子琴作为一种乐器，对丰富人们的日常生活起着一定的作用，是人们的生活更加丰富多彩。对于缓解人们的紧张情绪，陶冶人们的情操等方面，电子琴作为娱乐工具的一种，作用自是不言而喻。电子琴结构复杂，声源是555产生的自激振荡，并通