摘要:随着科技的发展,微型电子琴是现代电子科学技术发展中的产物。微型电子琴属于键盘乐器的一种,微型电子琴又被称之为“电子风琴”,是世界上电子乐器之一。世界上的第一架电子琴是由美国的发明家卡希尔在1904年时制造出来,重达将近200吨之多。但随着电子技术的飞速的发展,电子琴也在不断地更新换代,也在不断进步,电子琴的飞速发展超出了人们的想象。它不仅能够模仿不同种类乐器的音色,而且就连许多未曾听过的声音也能表达出来。本文的主要内容是STC89C51单片机为核心控制元件,设计一个微型电子琴。以单片机作为主控核心,与键盘、扬声器等模块组成核心主控制模块,在主控模块上设有16个按键和扬声器。其优点是硬件电路简单,软件功能完善,控制系统可靠,性价比较高等,具有一定的实用和参考价值。90895
毕业论文关键词:微型电子琴,STC89C51单片机,键盘
Abstract:With the development of science,Micro electronic organ is the modern electronic products in the development of science and technology。Miniature keyboard is a kind of keyboard instrument,Miniature keyboard and is referred to as "electronic organ",It’s one of the electronic musical instrument in the world。 The first electronic organ is made by the American inventor Cahill in 1904 in the world,weighing nearly 200 tons。But with the rapid development of electronic technology,the keyboard is in constant renewal,Also in constant progress, the rapid development of electronic organ is beyond people's imagination。It not only can imitate different kinds of Musical Instruments sound, and even many have not heard the voice can also be expressed。 The main content of this article is STC89C51 single chip microcomputer as the core control components, design a micro electronic organ。 With single chip microcomputer as control core, keyboard, speakers and other core modules of main control module, on the main control module has sixteen keys and speakers。 The advantage is hardware circuit is simple, software function is perfect, the control system is reliable, high cost performance, has certain practical and reference value。来自优I尔Y论S文C网WWw.YoueRw.com 加QQ7520~18766
Key words:micro electronic organ,STC89C51 single-chip computer,Keyboard
目录
1 前言 3
1。1 音乐的起源 3
1。2 电子乐器的产生 3
1。3 设计目的及其意义 3
1。4 本系统主要研究内容 4
2 基本组成和硬件框图 4
2。1 基本组成 4
2。2 硬件框图 5
3 系统的硬件结构 5
3。1 单片机STC89C51的简介 6
3。2 键盘电路 8
3。3 振荡电路 9
3。4 复位电路 9
3。5 音频放大电路 10
3。6 数码管电路 11
4 系统的软件设计 11
4。1 系统设计原理 12
4。2 软件流程图 13
5 系统调试 15