题 目 一种基于单片机的数控电源设计 专 业 电子信息科学与技术 院 部 信息工程学院 学 号 姓 名 指 导 教 师
答 辩 时 间 2016年5月
工作时间： 2015年12月 至2016年5月
绵阳师范学院2012届本科毕业设计（论文）
一种基于单片机的数控电源设计
摘 要：电的发明使得我国各行各业有了飞速的发展，无数新型的产业随之出现了。直到今天，电在我们生活中扮演了非常重要的角色。然而发电站传输给我们广大用户的是380/220V交流电，人们为了使生活更加便利，微型化发展是电器的必经之路。随着科技进步，人类用电量也在增加，又要低功率的电器，因此将高压转变成低压并且能够安全且可靠的提供给各种小电器使用的小电源受到了电器行业的欢迎。近年来小电源已经有了很大的市场，技术也在慢慢成熟。如今，单片机还融入了小电源，使小电源数字化，智能化。
此课题研究设计数控电源采用了以ST89C52单片机为数控电源的核心部件，LCD1602液晶显示，DAC0832数模转换，317可调稳压芯片，7805稳压5V芯片和稳压电路组成。
关键词：STC89C51单片机；ADC0832；LCD1602；LM324
绵阳师范学院2012届本科毕业设计（论文）
By Microcontrollers NC-based power supply design
Undergraduate: Qian Cao Supervisor:Gongming Zhou
Abstract:With the discovery of electricity ，all works of life have developed rapidly and innumerable types of new industries have emerged.Up to now，electricity plays a very important role in our life.However，the alternating current(AC)from power stations to users is only 380/220V.For a more convenient life，miniaturization is the future development of appliances .With the development of technology，the power consumption of human beings is also increasing.Most people prefer low-power appliances.The small electric sources are welcomed by the industry of electrical appliances，because they are produced by transforming the high voltage into the low one，and they can ensure the safety and reliability of appliances.In recent years ，small power sources have had a large market ，and their technology has been gadually becoming higher.Nowadays Single-Chip Microcomputer(SCM)has been combined with small power sources，making them digital and intelligent.
This topic design of NC power supply using the microcontroller to st89c52 for digital power supply of the core components， LCD1602 LCD display， DAC0832， 317 can be adjustable voltage chip， 7805 steady 5V chip and a voltage stabilizing circuit.
Key words:STC89C51 MCU;ADC0832;LCD1602;LM324
绵阳师范学院2012届本科毕业设计（论文）
目录
1 前言.................................................................................................................................... 1
1.1研究目的和意义....................................................................................................... 1 1.2本设计的主要要求................................................................................................... 1 2 系统总体概述.................................................................................................................... 2
2.1数控电源设计思路................................................................................................... 2 2.2方案的选择............................................................................................................... 2 2.2.1 单片机模块设计方案的论证与选择............................................................... 2 2.2.2显示模块的设计方案的论证与选择................................................................ 2 2.2.3电压源的设计方案与选择................................................................................ 3 3 硬件设计............................................................................................................................ 4
3.1滤波降压模块........................................................................................................... 4 3.2供电稳压模块........................................................................................................... 4 3.3 LCD1602显示模块.................................................................................................. 5 3.4主控单片机模块....................................................................................................... 6 3.5运放电路模块........................................................................................................... 8 3.5.1 DAC0832 ........................................................................................................ 8 3.5.2 LM324............................................................................................................. 9 4 软件设计.......................................................................................................................... 10
4.1软件流程图............................................................................................................. 10 5 结论.................................................................................................................................. 12 致 谢.................................................................................................................................. 13 参考文献.............................................................................................................................. 14 附录一 源程序.................................................................................................................. 15
MAIN主程序: .............................................................................................................. 15 LCD1602驱动程序: .................................................................................................... 16 附录二.................................................................................................................................. 20
