此程序为是用在电子警察上面的，模拟 红绿灯信号用的，

在PIC上使用5个口线产生DTMF信号-use five lines I have DTMF signals

在单片机上面实现对DS18B20的运用，主要是是对此芯片的驱动可以让大家参考。-In SCM to realize the above DS18B20 use is the main driver of this chip can be for our reference.

EM推出的可读写卡片EM4469，带有512bit存储空间，程序基于AVR系列单片机，可对EM4469进行读定操作-EM introduced the card can read and write EM4469, with 512bit memory space, the program series based on the AVR microcontroller, can be read on the EM4469 is scheduled to operate

C51 LCD1602 4线并口通信源程序-C51 LCD1602 4 line source parallel communication

一个通过方向判别芯片进行角度计算的程序，实现简单的方向判别功能-Determine the direction of a chip through the perspective of the calculation procedure, the direction of the realization of a simple discriminant function

深井泵自动控制器，其中包括完整的硬件设计和软件程序，可以为初学者练手用。-deep well pump automatic controller, which includes a complete hardware design and software program for beginners to practice hand.

ADI公司，型号为ADuC814的单片机的I2C总线通讯程序源码，含MASTER和SLAVE两种方式-ADI, model for the SCM ADuC814 I2C bus communication program source code, including the MASTER and SLAVE two ways

用51单片机控制硬盘读写，并用通过液晶界面显示。-SCM control with 51 hard drives to read and write, and use the LCD interface display.

供C51单片机初学C语言的朋友学习使用的演示程序-C51 single-chip C for beginner friends learning to use language demo program

电子密码锁程序，可以密码在线修改，延时锁定，密码重置等功能 -Electronic password lock program, you can change your password online, delay lock, password reset and other functions