本人在C#下SAFE编程，如何在.net 环境下控制硬件设备通讯，涉及I/O卡、COM通信...

一个电机的接线图,不过还是不错的啊,步进电机四线接法.-A motor wiring diagram, but still ah good, stepping motor four-wire connection.

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this is rar files useful for the project beginers

图书管理 1.将各个项目子目录拷贝到硬盘上，然后可以用Visual Basic打开程序。 2.在每个项目子目录里面的sql目录里，将后缀.sql的文件打开后，拷贝到SQL Server 2000的查询分析器里。然后执行将产生需要的数据库结构。-management of a library. All projects will subdirectory copy to the hard drive, which can then be opened in Visual Basic procedures. 2. Each item inside the subdirectory sql directory of extensions. Sql open the document, copies of SQL Server 2000 inquiries analyzer Lane. Then needs arising from the implementation of the database structure.

清华大学计算机系列教材 计算机系统结构（第三版）-series teaching computer system architecture (third edition)

介绍了vhdl设计fpga时仿真和综合的过程，包括软件的应用和一些注意事项，相信会对大家有所帮助-introduced a VHDL design and simulation when they simply integrated process, including software applications and some attention to matters, we believe it will help

PARLAY DOCUMENT FROM 3G

PCI9054数据资料完整版，对本地总线的各种模式有详细叙述。-PCI9054 full version of data on the local bus models are described in detail.

很辛苦才画出来的一个开关电源原理图，protel 99 se上的。印刷出来能工作-How much could draw out a switching power supply schematic, protel 99 se on. Printing can work out

在无线通信中使用跳频技术是军事通信中最主要的抗干扰手段之一, 而如果系统中能使用合适的中心频率可以快速跟踪跳频变化的带通滤波器将可以明显改善系统的抗干扰性能。文中从实际应用出发, 比较了几种可用于实现带通滤波器快速变频的方案, 选择了简单、实用的开关电容阵改变带通滤波器中心频率的方案-The use of frequency hopping in wireless communication technology is the most important anti-jamming in military communications, one of the means, and if the system can use the appropriate center frequency can be fast-tracked changes in frequency-hopping band-pass filter will be able to significantly improve the system anti-jamming性能. This paper from the actual application, the comparison of several band-pass filter can be used to achieve the rapid conversion of the program, choose a simple, practical switched capacitor array to change the center frequency of band-pass filter program