Matrix-keyboard

自己画的四轴飞行器，原理图，pcb。。。。。。。。。。。。。。。。。。。。。。。为了20个子，我真的不容易(Own painting Four aircraft, schematics, pcb)

nRF51822低功耗蓝牙4.0资料和设计指导说明。(nRF51822 BLE bluetooth 4.0 desgin guide)

使用读卡器实现了为个人化的IC卡数据读写(Achieved using the reader for personal IC card data read and write)

毕业设计时做DC600V逆变器测试系统，采用工控机为主控制器，PCL-818数据采集卡， VC++作编程工具，对25T、25k型客车使用的逆变器进行性能测试。(Graduation time to do DC600V inverter test system, IPC-based controller, PCL-818 data acquisition card, VC++ as a programming tool, 25T, 25k bus-type inverter used for performance testing.)

本书是“国际电气工程先进技术译丛”之一，该书分14章，介绍了各种大功率变频器的拓扑结构及原理、传动系统的组成，以及与此相关的各种先进控制策略。书中还同时详细地给出了多个专题的相关技术背景。可作为学术研究、产品开发等专业技术人员或产品工程师参考。介绍了大功率变频器及中压交流传动的最新发展技术，包括各种大功率变频器拓扑结构、脉冲调制方法、先进控制策略以及工业产品设计经验。包括250多个图表，对所有的主要理论和控制方法都给出了计算机仿真结果和试验波形。对实际产品设计和工业应用中各种问题，书中也进行了介绍。(This book is one of the "international electrical engineering advanced technology translations", the book chapter 14 points, this paper introduces all kinds of high-power inverter topology and principle, the components of the drive system, and the related all kinds of advanced control strategy.Is also given in detail in the book more than one project related technical background.Can be used as an academic research, product development and other professional and technical personnel, or product engineer reference.High-power inverter are introduced and the latest development of medium voltage ac drive technology, including all kinds of high power converter topology, pulse modulation methods, advanced control strategy and industrial product design experience., including more than 250 chart for all the major theories and control methods are the computer simulation results and experiment waveforms are given.For all kinds of problems in the actual product design and industrial application, th)

zigbee无线定位系统的相关程序代码。很有用 都有相关解释(zigbee location code)

底层调用了PCSC的通信库Winscard，可用于PC上读卡器与智能卡的通信(It calls the underlying communication library Winscard PC can be used on a PC to communicate with the smart card reader)

本作品以MSP430单片机为核心， 基于DDS原理，通过查表方式输出步进量为10HZ，频率为100HZ~2KHZ的正弦波。两路被测信号通过过零比较、异或和低通滤波整流，实现了对相位差的测量，误差小于(This works with MSP430 microcontroller as the core, based on DDS principle, by look-up table output step sizes for the 10HZ, frequency of 100HZ ~ 2KHZ sine wave. Two by the signal zero-crossing comparator, XOR, rectification and low-pass filtering, the realization of the phase of the measurement error is less than)

说明：  数字滤波器，AD采样的值进行数字滤波，得到较理想的值(Digital filters, AD sampling the value of the digital filter, to be more ideal value)

万年历开发 时间Calendar Development - Time(Calendar Development- Time)