smscphy

This class checks whether the output is up to date.

声表面波用于无损检测中，发射接收技术以及采用压电智能材料(saw,surface acoustic wave)

斩波电路也称为直接直流变流电路，它的功能设计将直流电变为另一固定电压或可调 电压的直流电，下面给出一种降压斩波电路。(The chopper circuit is called direct DC converter circuit, it will function design of DC to DC voltage or other fixed adjustable voltage, a chopper circuit is given below.)

这是一本关于Intel 80C51以及广大的51系列单片机的书这本书介绍给读者一些新的技术使你的8051工程和开发过程变得简单请注意这本书的目的可不是教你各种8051嵌入式系统的解决方法(This is a book about the Intel 80C51 microcontroller, and the majority of the 51 books this book introduces readers to some new technology to make your 8051 project and the development process easier, please note that the purpose of this book is not to teach you a variety of 8051 embedded system solution)

说明：  本程序为单片机对四相步进电机的控制，使用L297，能够通过键盘设置电机的转动角度，精度为1度，文件夹里附有源代码和仿真电路图(This procedure for the single-chip for four-phase stepper motor control, use L297, set up through the keyboard of the rotating electrical point of view, an accuracy of 1 degree, with a folder in the source code and simulation circuit)

说明：  Control module for a Sony projector

实现RC522射频芯片的读写，扣费，注册，和充值等功能，51单片机绝得可以用(RC522 RF chip to read and write, chargeback, registration, and recharge function, 51 MCU must have to be able to use)

cd4051芯片驱动,定义管脚后可直接调用输出接口，输出值以在头文件中给出(driver for cd4051 )

基于瑞萨（原NEC）8位单片机79F8513A开发的新风系列控制板。 主要功能，ADC采集，串口通讯，输入扩展74HC4051D，IO口模拟I2C通讯，新风机组风机控制等功能。(The new wind series control board is developed based on the 8 bit single chip 79F8513A of NEC. The main function, ADC collection, serial port communication, input extended 74HC4051D, IO port analog I2C communication, fan control of new wind unit, etc.)

说明：  基于操作系统，GUI的人际交互界面，，嵌入式智能物业风扇的驱动(Operating System, GUI-based Interactive Interface, Driving of Embedded Intelligent Property Fan)