简单数字电压表的设计
摘要 本文介绍了基于单片机的简单数字电压表的设计,该设计有三个部分组成,分别是A/D转换器,数据处理器,以及显示器。
该系统的数字电压表电路结构简单,成本少,测量精确。该电压表可以测量0-8V的8路输入电压值,并在四位LED数码管上轮流显示或单路显示。
关键词:单片机 A/D转换器 显示器
Abstract:This paper introduces the design of a simple digital voltage meter based on single chip microcomputer,This design is composed of three parts, respectively is A/D converter, data processor, and display.
The system of the digital voltage meter circuit has the advantages of simple structure, low cost, accurate measurement. The 8 input voltage can be measured 0-8V values of voltage meter, and in turn four LED digital display tube or single.
Keywords: single chip A/D converter display
目录
第一章 引言...................................................................................................4
第二章 设计总体方案…………………………………………………………….5
2.1设计要求......................................................................................5
2.2设计思路......................................................................................5
2.3设计方案......................................................................................5
2.4设计总图......................................................................................5
第三章 硬件设计
3.1单片机..........................................................................................7
3.1.1ATC89C51特点.........................................................................7
3.1.2ATC89C51P口特点..................................................................10
3.1.3ATC89C51远程通讯电路..........................................................12
3.1.4win98TPC机与89C51通信程序...............................................12
3.1.5ATC89C51软件设计..................................................................14
3.1.6内部单元...................................................................................16
3.2LED显示系统...............................................................................18
3.2.1LED电路设计............................................................................18
3.2.2LED重要选择............................................................................19
3.3A/D转换模块.................................................................................21
3.4复位电路和时钟电路.....................................................................22
3.4.1复位电路....................................................................................22
3.4.2时钟电路....................................................................................23
结束语
附表
参考文献
总结
参考文献
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