基于单片机的简易电子琴的设计与制作6月16日打印稿_李丹.docVIP

本科毕业设计（论文） 题目：基于单片机的简易电子琴的设计与制作 教学单位： 专 业： 学 号： 姓 名： 指导教师： 2014 年月  摘 要 本文简述了一个由51单片机制成的简易电子琴。之所以选择51单片机来设计简易电子琴，目的是为了在这个电子技术迅速发展的时代，通过做一个简易电子琴，把自己所学到的理论知识与实际相结合，以此来巩固之前在课堂上所学到的书本知识。 在本文中需要实现两个功能——能够手动演奏和自动播放一首歌曲。本文介绍了利用AT89C51单片机，LM386放大器，LCD液晶显示器，4×4的矩阵键盘，扬声器，来设计一个简易电子琴。由于用51单片机产生的音频脉冲来直接驱动扬声器并不能达到本论文的要求，因此，需经过LM386放大，再通过扬声器播放，这样才能得到我们想要的声音。LCD液晶显示器主要用来同步显示歌曲播放的时间。 最后，本文对电子琴用PROTEUS软件进行了模拟仿真，从仿真的结果来看本文设计的简易电子琴达到了预期的目标，并且具有运行稳定、功能完善、电路简单和性价比高等优点。 关键词：电子琴；AT89C51；LCD；PROTEUS  Abstract This paper describes a simple electronic organ instrument which made of 51 single chip microcomputer. With the rapid development of the electronic technology, choosing 51 SCM to design a simple electronic organ I have my reasons. By making a simple electronic organ, I combine the theory knowledge that I have learned with reality, in order to consolidate the book knowledge that I previously learned. In this thesis, the instrument need to achieve two functions, namely, it can perform a song manually and automatically. This paper describes that use AT89C51 chip, LM386 amplifier, LCD liquid crystal display, 4×4 matrix keyboard, and speaker to design a simple electronic organ. Because just with 51 single-chip’s audio pulse to directly drive the speaker does not meet the requirements, therefore, it needs to use LM386 amplification, and then plays through speaker, so we can get the sound what we want. LCD liquid crystal display is mainly used for the purpose of display song playing time synchronously. Finally, simulations are carried out with PROTEUS software. The simulation results show that the simple electronic organ instrument designed in this paper has achieved the anticipated targets, and has the advantages of high reliability, good technical performance, simple circuit, and high performance price ratio and so on. Key Words: electronic music instrument, AT89C51, LCD , PROTEUS 目 录 第1章 绪论 1 1.1 论文研究的背景和意义 1 1.1.1 研究背景 1 1.1.2 研究意义 1