利用ps2键盘向单片机输入数据，这样做不仅可以减少输入输出口，而且程序代码短小精悍，可以极大的提高单片机的执行效率．...

本人非常支持单片机设计DIY 在这里再次献出小弟的一点心意,下面是使用AT89S52驱动74HC4015,实现1选择8的数据通道切换器,可以在不8个通道出加上不同大小的电阻.可以用来单声道音量的大小控制. 下面作品图是小弟设计的廉价的 基于单片机的毕业设计 ,它还使用了无线接收发送模块,通过使用手上的遥控器能控制音量的大小,还加了一块HCF4052用于输入音道的选择,支持思路音频信号的输入,一路音频信号的输出: -I very much support the single-chip design DIY here again gave a little boy s mind is to use the following AT89S52 drive 74HC4015, to achieve a choice of 8 switches the data channel, you can not add the 8-channel resistance of different sizes. Can used to the size of mono volume control. The following work plan is designed小弟cheap graduation based on single-chip design, it uses the wireless receiver send module, through the use of the hands of the remote control can control the volume size, but also Add a piece of HCF4052 Road for the importation of sound choices, to support the idea of audio signal input, the output audio signal all the way:

课程设计，单片机用的是at89s51，C语言编程，希望对有的同学友邦做-Curriculum design, single-chip microcomputer is used at89s51, C language programming, in the hope that some students do AIA

单片机实例，多个实例运用，迅速掌握单片机技术-Singlechip example, multiple instances of the use of single-chip technology quickly grasp

C8051FXXXX的一个开发例程，对于接触C8051F12X的开发者比较有用，可以下载看一下-C8051FXXXX development of a routine, contact C8051F12X developers more useful, can be downloaded to look at

51 单片机 汇编子程序 含计算 子程序-51 subprogram

用0832做的波形发生器 做信号的可以看看 用单片机控制的-0832

一个关于高速单片机红外编码解码的例程，希望对做红外通信的朋友有所帮助。-on a high-speed infrared codec SCM"s routines, and I hope to do the infrared communications friends help.

51单片机C语言编程实例，从基本的点亮发光二极管、蜂鸣器，到串口通信、LCD、最后详细介绍了51单片机在智能电动小车上的应用。-51 Microcontroller C programming examples, from basic light-emitting diode, buzzer, to the serial communications, LCD, lastly, a detailed description of the 51 SCM in the smart mini-car applications.

MCS―51单片机系统扩展 简单的并行接口由数据寄存器和少量的控制电路组成，暂存传送的数据。以锁存器、缓冲器为主要芯片，稍加控制都可以作为简单的并行接口.-MCS-51 single-chip microcomputer system to expand a simple parallel interface from the data register and a small number of control circuit components, temporary storage of data transmission. To latches, buffers as the main chip, a little control can be used as a simple parallel interface.

控制小车用PWM方式来控制小车的转速，小车的步进电机需要用直流电机控制，因为单片机产生的电流小，需要驱动-Vehicles with PWM control mode to control the car