毕业设计论文
基于单片机直流稳压电源的设计
摘要
几乎所有旋钮开关都调节电压，调节精度低，经常跳转，使用麻烦。目前数控电源的发展主要是为了更高的数控精度、分辨率和更好的动态特性；更好的环保性能；智能和高可靠性；更广泛的应用方向。本设计利用AT89S51控制数模转换模块作为主控芯片DAC通过放大器，0832的输出电压OPA552放大输出。用数码显示模块设置四个按钮，实现电压增减。电流可达200mA。数控电源控电源AT89S51；DAC0832；OPA552
Abstract
Direct current voltage-stabilized power supply is one of the commonly used equipment in electronic technology. It’s widely used in teaching, researching and other fields.Most of the traditional direct current voltage-stabilized power supply use the knob switch to adjust the voltage.It has the trouble of low-precision and difficult to control. The structure is complex and the volume is large.
The numerical control technique of single chip microcomputer is adopted in the design of direct current voltage-stabilized power supply for a digitalized.Having numeral display,the direct current power can adjust voltage programmably and differentiate voltage precisely.Moreover,it’s easy to have its function enlarged through the programmer.Numerical control direct current voltage-stabilized power supply mainly toward to high-precision,high-resolution,better dynamic characteristics,better environmental performance,intelligent,high reliability and wider application direction.
In this design,using the AT89S51 as main module to control the output voltage of DAC0832. The voltage is magnified by amplifier OPA552. In this system, the step of voltage is control by four keys, and the display module is also designed.The step precision is 0.1V,the output voltage is range from 0V to 15V and the current is up to 200mA.
Key words: Numerical control power；AT89S51；DAC0832；OPA552
目录
I
AbstractII
第1章 绪论1
1.1 主题背景及意义1
1.2 数控电源开发1
第2章 方案设计3
第3章 系统硬件电路设计4
3.1 主电路设计4
3.2 具体电路介绍4
3.2.1 主控单元电路4
3.2.2 信号处理电路8
3.2.3 电压放大电路12
3.2.4 按键电路14
3.2.5 显示电路15
第4章 18系统软件设计
4.1 程序运行原理18
4.2 程序流程19
4.2.1 延迟子程序流程19
4.2.2 拆分送显存子程序流程19
4.2.3 显示子程序流程20
4.2.4 主程序流程21
第5章 设计仿真及调试22
5.1 WAVE6000集成调试软件简介222
5.2 程序调试步骤23
第6章 电