51单片机直流步进稳压电源设计+源程序+电路图
本文设计了一个简易数控直流稳压电源，系统的控制核心AT89C51微控制器。论文主要讲述该电源的总体方案设计和论证，硬件电路以及软件部分的设计。该系统的硬件部分包括89C51单片机、LM317集成稳压器、电阻网络（继电器和等比电阻）、键盘电路、显示电路、复位电路、晶振电路。输出电压采用键盘输入方式，操作使用方便，液晶显示电压值。由LM317三端可调式集成稳压器来保证输出电压的稳定性。
关键词 AT89C51单片机 LM317集成稳压器 数控稳压电源 液晶显示
毕业设计说明书（论文）外文摘要
Title Design of DC stepper supply based on Microprocessor control unit
Abstract
DC power supply is the basic components of the electrical, electronic, automation equipment, There is a direct correlation between the performance of the equipment and the stability of the power. The output voltage of traditional power has low stability, big error and the voltage is not intuitive visible. Microcontroller based DC power supply can be a good solution to these problem.
This paper presents a simple digital DC power supply, the control core of the system is AT98C51 MCU. This paper mainly tells the overall design scheme and argumentation,the design of hardware circuit and software design. Hardware design includes key circuit, LCD module, oscillation circuit, reset circuit, relay circuit. using keyboard input to change output voltage, using LM317 adjustable three-terminal integrated voltage regulator, high Precision, small output ripple.
Keywords AT89C51MCU LM317 integrated voltage regulator NC Regulators
Power Liquid crystal display
目 次
1 引言 1
1.1 研究背景及意义 1
1.2 国内外发展现状 1
1.3 论文的主要内容及章节安排 2
2 系统总体方案设计 2
2.1 系统硬件结构设计 2
2.2 方案论证 3
2.3 器件选择 3
3 硬件电路 4
3.1 单片机AT89C51 4
3.2 74C922按键电路 7
3.3 LM016L液晶显示电路 8
3.4 LM317稳压电路 10
3.5 继电器控制电路 12
3.6 硬件总图 13
4 软件设计 14
4.1 开发环境介绍
4.2 按键程序 2
4.3 液晶显示程序 2
4.4 继电器控制程序 2
4.5 使用说明 2
5 引言 1