STM32 USB读卡器

空气湿度报警器，顾名思义，是用来测量空气中的湿度的仪器，他通过一个湿敏电容和一个频率输出电路对空气湿度进行检测，把湿度变化转变成频率输出。再通过单片机把输入的频率转化为湿度百分值并通过LCD显示出来，使人可以通过显示清楚地看到空气的相对湿度。在单片机编程时可以预先设定一个限定值，当环境湿度达到设定的湿度值时电路报警，同时发光二极管变亮，达到湿度报警的目的。-Air humidity alarm, as the name implies, is used to measure humidity in the air apparatus, he humidity through a capacitor and a frequency output circuit for detection of air humidity, the humidity changes in the frequency of the output into. Through the single-chip frequency of the input into a percentile and humidity through the LCD display, one can clearly see through the display of the relative humidity of air. Single-chip can be programmed in advance to set a limit value, when the environmental humidity to achieve set alarm circuit humidity values, while LED light changes to achieve the purpose of humidity alarm.

OpenCV 4下的图像变换，可以进行图像的旋转操作。-OpenCV 4 transform the image, the image can operate rotation.

用Visual C++ 实现位图的快速傅立叶变换和反变换-Using Visual C++ Realize bitmap of Fast Fourier Transform and inverse transform

猜数字，给定六个数列的生成公式,随机地从上述数列中选取一个作为本轮游戏的数列，并从该数列中随机地选取连续地三个元素，请用户猜该数列的下一个元素是什么？-tones, given the series of six generating formula, random from the series were selected as a game of this round of the series, and from the series of randomly selected to three consecutive elements, which users guess the next series is one element of what?

source code for the gasket programme

Calculate Gravitational map

一个RFC3261的中文版本，关于SIP协议的，说明很详细，英文不好的省好多事呢-a RFC3261 the Chinese version of SIP, describing in great detail, English is not good to do many of the provinces

amrwb适用于3G系统的变速率语音编码技术，这篇文档介绍了amrwb中的帧结构。-amrwb applicable to the 3G system variable-rate speech coding technology, This document describes the amrwb the frame structure.

计算机组成原理实验报告-Principles of Computer Organization Experimental Report

xml解析器。很好用的-xml parser. The good