介绍一种采用半桥电路的开关电源，其输入电压为交流220V±20％，输出电压为直流4～16V，最大电流40A，工作频率50kHz。重点介绍了该电源的设计思想，工作...

本文介绍了一种控制普通阀门的阀门控制器的设计方案，该阀门控制器带有工业现场总线PROFIBUS－DP 的接口，可以实现阀门的远程控制和网络控制。本文主要的着力点为介绍利用PROFIBUS－DP 专用芯片SPC3 开发PROFIBUS－DP 设备中需要注意的一些问题，包括硬件接口设计，有关PROFIBUS－DP 规范标准的一些设计要点，以及利用PROFIBUS－DP 诊断功能的方法。本文对设计其它Profibus DP从站节点有很好的参考价值!-This paper presents a general valve control valve controller design program The valve controller with industrial PROFIBUS-DP interface. The valve can be achieved remote control and network control. This paper mainly focus on the use of PROFIBUS-DP SPC3 ASIC development PROFIB U.S.-DP equipment necessary to pay attention to a number of issues, including the hardware interface design, The PROFIBUS-DP standards in a number of design features, and the use PROFIBUS-DP diagnostic function method. In this paper, the design of other Profibus DP slave nodes are of value!

基于WEB的项目管理系统 优秀毕业论文-Web-based project management system outstanding thesis

TI公司移动终端解决方案，支持GSM/GPRS。-TI Mobile Terminal solution that supports GSM/GPRS.

PIC based On Screen Display video generator (PAL).

如果想要的我这里还有一些这样 东西 可以自己做一些小的产品 也可以上网什么的都是可以实现的SolidConverterPDF PROPDF转换WORD.0 绿色特别版-If you want me here so there are still some things can make a number of small products can also be what the Internet can be achieved SolidConverterPDF PROPDF conversion WORD.0 Green Special Edition

介绍了光电流互感器和实现电流互感器的通讯接口的设计方案。-introduces the current transformer and current transformer to achieve the communication interface design.

异步电动机控制系统（VVVF系统）频率测量三相异步电动机的基本控制方式定子截面的均方根是电动势

一种基于软件无线电的数字中频和基带处理平台-A software-based radio digital IF and baseband processor platform

Doxygen 的使用简介-Doxygen the use of profiles

介绍了基于GPRS网的数据传输、嵌入式实时操作系统u/OS-II以及小型TCP/IP协议栈uIP；深入论述了基于8051嵌入式系统的GPRS终端的实现。提供了一种罗为简单、廉价和实用的GPRS终端的实现方案，说明了在8051中如何进行uC/OS-II和uIP的移植。-Introduction based on the GPRS network, data transmission, embedded real-time operating system u/OS-II and small TCP/IP protocol stack uIP go into the 8051-based embedded systems realize GPRS terminals. Romania provides a simple, cheap and practical realization of the GPRS terminal program, described in 8051 how to uC/OS-II and uIP transplant.