目录要....................................................................................................................................................... 2摘......................................................................................................................................... 41 设计任务和要求...................................................................................................................................... 4.1.1：设计任务.................................................................................................................................... 4：设计要求.1.2 ........................................................................................................................................ 4方案比较与论证.2 .......................................................................................................................... 4 .：稳压电源通常由2.1.................................................................................................................................... 8 .2.2 ：方案论证错误！未定义书签。

硬件设计. (3).................................................................................................. 错误！未定义书签。

3.1 ：设计思想............................................................................................... 错误！未定义书签。

3.2 ：称功能模块.系统仿真.. (84).................................................................................................................... 8：仿真原理图如下：.4.1 错误！未定义书签。

................................................................................................................ 5系统的组装............................................................................................... 错误！未定义书签。

PCB版板图.：5.1 ......................................................................................................................................................... 96 结论：错误！未定义书签。

参考文献：................................................................................................................... .................................................................................................. 错误！未定义书签。

附录一：电路原理图.错误！未定义书签。

：元件列表...................................................................................................................摘要：随着电力电子技术的高速发展，电力电子设备与人们的工作、生活的关系日益密切，而电子设备都离不开可靠的电源，进入80年代计算机电源全面实现了开关电源化，率先完成计算机的电源换代，进入90年代开关电源相继进入各种电子、电器设备领域，程控交换机、通讯、电子检测设备电源、控制设备电源等都已广泛地使用了开关电源，更促进了开关电源技术的迅速发展，555是一种应用特别广泛作用很大的的集成电路，属于小规模集成电路，在很多电子产品中都有应用。

ne555的作用是用内部的定时器来构成时基电路，给其他的电路提供时序脉冲，而开关电源（英文：Switching Mode Power Supply），又称交换式电源、开关变换器，是一种高频化电能转换装置。

其功能是将一个位准的电压,透过不同形式的架构转换为用户端所需求的电压或电流。

开关电源就是利用电子开关器件（如晶体管、场效应管、可控硅闸流管等），通过控制电路，使电子开关器件不停地“接通”和“关断”，让电子开关器件对输入电压进行脉冲调制，从而实现DC/AC、DC/DC电压变换，以及输出电压可调和自动稳压关键词：NE555,开关电源，稳压电路：Abstract：With the rapid development of power electronics technology, power electronic devices and is closely related to people's work and life, and the electronic equipment is inseparable from the reliable power supply,into the 80 s is made up of the computer power supply switch power supply, power generation, the first complete computer into the switch power supply in the 90 s have entered various electronic, electrical equipment, program-controlled switches, communications, electronic test equipment such as power supply, control equipment power supply has been widely used for switching power supply, more promote the rapid development of the technology of switching power supply, 555 is a special widely used large integrated circuit, belong to the small-scale integrated circuit, are used in many electronic products. Ne555 role is to use internal timer to constitute the time-base circuit, to other provide temporal pulse circuit,and Switching Power Supply (English: Switching Mode Power Supply), also called Switching Power Supply, Switching converter, is a kind of high voltage to a device. Its function is frequency electric energy conversion level, through the different forms of architecture into the voltage or current client demands. Switching power supply is the use of electronic switching device (e.g., field effect transistor, SCR thyratron, etc.), through the control circuit, the electronic switch devices constantlyon and off, make electronic switching device to pulse modulation of voltage, so as to realize the the input DC/AC, DC/DC voltage conversion, and output voltage harmonic voltage automaticallyKeyword: NE555, switching power supply, voltage regulator circuits1 设计任务和要求1.1设计任务(1)．利用NE555制作开关稳压电路设计；(2)．彩灯电路的设计；(3)．首先用软件Multisim对电路进行仿真，然后用Altium designer绘制电路原理图，并制作PCB；(4)．开关电源焊接、调试1.2 设计要求(1)、输入交流电压5，50Hz。