简易电子琴课程设计[1].docx

课程设计说明书 课程设计名称：数字逻辑课程设计 课程设计题目：简略电子琴 学院名称：信息工程学院 专业：**************班级：**** 学号：********姓名：***** 评分：教师：*** 2011年6月28日 纲要 跟着社会的进步发展，音乐逐渐成为我们生活中很重要的一部分，而乐器更是应用宽泛，几乎在更大软件均有乐器制造。所以本文就设计了一个简略电子琴。电子琴是现代电子科技与音乐联合的产物，是一种新式的键盘乐器，在现代音乐中饰演侧重要的角色。 本实验侧重叙述了怎样使用555制作简略电子琴产生8个不一样音阶控制电路的设计，当操作者按下8个按键即可产生8种不一样的音调，而后经过LM386功率放大器进行音调放大。本实验达成了简略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：实现基本要求时只需用555构成多谐振荡电路，经过不一样的电阻（用变阻器调理成8个所需电阻）来获取不一样的频次，再经过LM386放大所以发出不一样的音调。假如要实现提升要求则需要在基本要求上增加一部分电路即可。经过开关控制不一样的电阻所对应的振荡电路的通断调理相应频次大小，进而产生不一样的音调。 自然在这从前要预先查阅资料，再查阅各个芯片的引脚功能的各个参数， 同时还要认识震荡电路，与其产生震荡的原理，在依据震荡电路计算出电阻值， 以便选择适合的电阻值，这些都是课前准备。测试电子琴要一步一步，第一是震 荡电路的线路测试，尽量除去噪声，使音质能够清楚，这样电子琴就做成了。通 过本次电子课程设计，不单掌握了简略电子琴的设计，更重要的是提升了着手实 践能力，从收集各方面资想到检查电路，充分锻炼了剖析问题以及解决问题的能 力。 重点词：简略电子琴，NE555，LM386，腔调 目录 序言································································1 设计的基本内容··············································2 设计要求介绍················································2 第二章系统构成及工作原理·····································3 系统构成···················································3 工作原理···················································4 方案一······················································8 方案二······················································9 方案三·····················································10 方案剖析与比较·············································11 第四章参数计算、器件选择····································12 参数计算···················································12 器件选择···················································12 第五章系统调试及测试结果剖析······························14 系统调试···················································14 测试结果与剖析·············································17 结论······························································19 参照文件·························································20 附录一····························································21 附录二····························································22 序言 电子琴作为一种乐器，对丰富人们的平时生活起着必定的作用，是人们的生活更为丰富多彩。关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，作用自是不问可知。