利用测量频率的方法进行运算 测量速度和里程，并用LED显示

该源程序是通过对键盘的扫描方式对键盘按键的识别-The source is the keyboard scan mode by the keyboard keys to the identification of

正弦波发生器大运用阿斯达是法国阿双方 威尔uweyr 饿efw98ur wef8u-sinwave founcation

AVR的引导程序。 chip45boot s-record bootloader.-AVR guidance procedures. Chip45boot s-record Bootloader.

两个7段共阳LCD显示器，可以调整倒计时时间-A total of two 7-yang LCD display, you can adjust the countdown time

这是一个旋转传感器的资料。通过可以设计remote mouse for computer.-this is a cell which can detect the whirl.

A/转换程序，用在8051或8031，此外还有两个小的显示的程序-A/switching procedures used in 8051 or 8031, in addition to two small display procedures

m25p64是AT退出的一款大容量flash存储器，8Mbyte.串行通信方式，极大的节省了硬件资源。-64Mbit of flash memory.page program(up 256 byte)in 1.4ms.sector erase (512Kbit)

介绍一种高分辨率的双路A/D转换器AD7711，能满足双路A/D采样要求。内容包括AD7711的特点， 内部寄存器结构和外部接口，并详细阐述了数据采集系统中AD7711与单片机AT89S8252的接口技术，包 括硬件接口电路和软件程序设计及其注意事项。 -Introduce a two-way high-resolution A/D converter AD7711, can satisfy the dual A/D sampling requirements. Include the characteristics of AD7711, the internal register structure and the external interface, and detailed data acquisition system with the AD7711 single-chip AT89S8252 interface technologies, including hardware interface circuit and software design and its attention to matters of procedure.

红外通信是利用950nm近红外波段的红外线作为传递信息的媒体，即通信信道。发送端采用脉时调制（PPM）方式，将二进制数字信号调制成某一频率的脉冲序列，并驱动红外发射管以光脉冲的形式发送出去；接收端将接收到的光脉转换成电信号，再经过放大、滤波等处理后送给解调电路进行解调，还原为二进制数字信号后输出。-Infrared communication is the use of near infrared 950nm infra-red as the transmission of information media, namely communication channel. The sending end when the use of pulse modulation (PPM) approach will be a binary digital signal into a frequency modulation of the pulse sequence, and driver fired infrared tube to the form of light pulses sent receiver will receive the pulse of light conversion to electrical signals , and then, after amplification, filtering and other treatment to the demodulation circuit after demodulation, reduced to a binary digital signal after the output.

一个完整的用51单片机控制温度传感器采集并显示的程序，温度传感器选用DS18B20，显示器为1602-An integrated temperature sensor with 51 control procedures for collecting and display, temperature sensor selection DS18B20, display for the 1602