文档介绍：毕业设计毕业设计论文毕业设计摘要将单片机数字控制技术,有机地融入直流稳压电源的设计中,设计出一款数字化通用直流稳压电源。该电源具有液晶显示、数字输入调压、电压调节精度高的特点。通过软件编程,易于实现功能的扩展。 AVR 系列的单片机不仅具有良好的集成性能, 而且都具备在线编程接口, 其中的 Mega 系列还具备 JTAG 仿真和下载功能;含有片内看门狗电路、片内程序 Flash 、同步串行接口 SPI; 多数 AVR 单片机还内嵌了 A/D 转换器、EEPROM 、模拟比较器、 PWM 定时计数器等多种功能;AVR 单片机的 I/O 接口具有很强的驱动能力,灌入电流可直接驱动继电器、 LCD等元件,从而省去驱动电路,节约系统成本。关键词:直流稳压电源; AVR 单片机;液晶显示 Abstract The single chip digital control technology, organic integration into the DC power supply design, digital design a universal DC power supply. The power supply has a liquid crystal display, digital input voltage, voltage regulation and high accuracy. Through software programming, easy to expand their role. AVR microcontroller series, the integration is not only good performance, and all have online programming interface, which also has the Mega series of JTAG emulation and download capabilities; with on-chip watchdog circuitry, on-chip program Flash, synchronous serial interface SPI; most AVR microcontroller is also equipped with aA/D converter, EEPROM, parators, PWM timer counter and other functions; AVR microcontroller I/O interface has a strong drive capability, poured into the current can directly drive relays, LED and ponents, thereby eliminating the need for circuit, system cost savings. Keywords: DC Power Supply; AVR microcontroller; LCD 毕业设计 3 目录一、前言........................................................................................................................ 4 二、系统功能................................................................................................................. 5 三、方案论证与比较..................................................................................................... 6 稳压电源的分类................................................................................................. 6 稳压电源部分方案.............................................................................................. 6 三端集成稳压芯片.......................................................................................