The-collapse-of-buildings

4层电路板阻抗匹配总结，基于si9000 推荐借鉴(PCB Impedance matching)

本例程源自网络，本人已调试可运行,本例程仅供大家学习交流(The routines from the network, I can run debugging for them to learn the routine exchange)

资料单片机的许多应用都需要进行人机对话，最简单的人机对话需要LED 数码管显示数 字和少量字符；键盘是解决计算机输入的简单手段；借此可以向计算机输入程序、置数、 送操作命令、控制程序的执行等等，所以使用非常广泛。(ziliao)

触摸芯片讲解使用和应用原理讲解触摸芯片使用规则(Touch to explain the use and application of the principle chips)

simulink of dynamic voltage restorer 2

An effecient algorithm has been proposed by Schmidl and Cox for carrier frequency estimation in orthogonal frequency-division multiplexing systems. The scheme is based on the transmission of a training symbol composed of two identical halves in the time domain. In this paper we extend this algorithm by considering a training symbol composed of L>2 identical parts. This makes it possible to achieve a better accuracy at the cost of some increase in computational load. The estimation range can be made as large as desired without the need of a second training symbol, as required by the Schmidl and Cox method.

说明：  红外接收相关资料，很值得一看，是初学者学习的绝好资料(Infrared receiver information, it is worth a visit, is an excellent information for beginners to learn)

说明：  本文件为正点原子悟空飞行器源码，ATKflight F405 V1.2版本，编译环境为MDK-ARM-V5，适合于新手学习，配套正点原子飞控器，体验飞控的乐趣(This document is the source code of the Point Atomic Wukong Aircraft, ATKflight F405 V1.2 version, compiled environment for MDK-ARM-V5, suitable for novice learning, matching the Point Atomic Flight Controller, experience the fun of flight control.)

适用于韦根26与34的通讯，基于stm32开发，自动切换，方便，兼容性强(It is suitable for communication between Wigan 26 and 34. It is developed based on stm32. It has automatic switching, convenience and strong compatibility.)

自动读取Felica 卡UID和Mifire 卡UID,可以作为门禁系统和考勤系统使用.(Felica card is automatically read and Mifire card UID UID, can be used as access control systems and time and attendance system.)