USB人机接口标准规范使用说明，PDF的格式

学生成绩管理工作是学校学生管理工作的重要组成部分，现在相当一部分学校的学生成绩管理工作仍沿用手工方式。随着学校规模的扩大、学生人数的增加，效率低下、容易出错的手工方式越来越不适应实际管理工作的需要，按照软件工程原理和数据库技术开发学生成绩管理系统已成为学生管理部门的迫切需要。-student performance management is the management school students an important component, considerable part of the school management of student achievement is still used manual. With the increased scale of the schools, the number of students increases, inefficient and error-prone manual increasingly unable to meet the actual needs of management, in accordance with principles of software engineering and database technology student performance management systems have become students of management an urgent need.

HLA (high level architecture) with UML design

0809AD转换，实现电压模拟值到数字量的转换-0809AD conversion, realizing the value of the analog voltage digital conversion

DS9200嵌入式开发平台的原理图，模块化的，大家可以参考-Embedded Development Platform DS9200 schematics, modular, everyone can refer to

IC卡读写器的常见问题集锦 了解ic卡读卡器的工作方式-IC Card Reader FAQ allehanda ic card reader to understand the working methods

著名的AVR 高压编程器HVprog原理图,y有了他就不再为熔丝错误,负位脚变IO,ISP被锁等等一些问题而烦恼了-famous for programming AVR hypertension HVprog diagram, y he will not have to fuse errors, Negative changes IO feet, the ISP was locked, and so on some issues and trouble

2009年全国大学生电子设计大赛C题--宽带直流放大器-2009 National Undergraduate Electronic Design Contest C title- Broadband DC Amplifier

内附IC读卡器设计方案,该设计使用89C52和MCM200,里面有详细的设计过程及程序代码,相信有一定IC卡经验，技术及具有一定的计算机软/硬件技术（尤其是微处理单片机MCU技术）的同行定能将本文消化之后而能设计出诸多应用场合的产品.-containing IC reader design program, which is designed to be used 89C52 and MCM200. There are detailed design process and procedure code, I believe a certain IC card experience, Technology and certain computer software/hardware technology (especially microprocessor MCU MCU technology) counterparts can extend the after the text digest able to design many applications products.

新型电脑针织横机选针器的工作原理及选型设计-New computer flat knitting machine needle selector of the working principle and selection of the design

电信本地网计费解决方案,在多个地方有成功应用案例.-local telecommunications network accounting solutions, in many places a successful application cases.