Here is some of the main board needs to learn maintenance knowledge, there are t...

非常有用的资料，对学习VHDL很有帮助，大家要好好珍惜-Very useful information, to learn VHDL helpful, we have to cherish! !

windows 操作系统精讲 简单详细 不是垃圾 看过有收获-windows operating system is not a simple garbage detail seen harvest

热能表设计参考：供热采暖的分户计量近一二年内-thermal design reference table : Heating of household metering within the last 12

信号的采样与重建 与信号系统相关的，希望对大家有点用处-Signal sampling and reconstruction associated with the signal system, in the hope that we are a bit useless

该文件是一个用于学习和交流的东西，有助于c程学习者-This file is one for learning and sharing things, helping learners c Cheng

医药触摸屏管理系统 课程设计 包括数据库设计，代码-medicine curriculum design management system including database design, code

带fpga单片机电路，很好用，大家一起-Microcontroller with fpga circuits, very good use, we take a look at

本软件具有刷５Q人气的功能，只要打开添入用户名和密码，就可以运行！-This software has a brush 5Q Popularity functions, as long as the open to add the user name and password, you can run!

adobe pdf 1.7格式的iso标准。用于写服务器端的pdf生成器时可能用的上。-adobe pdf 1.7 standard iso format. Used to write server-side pdf generator may be used on.

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.