精度为20位的数模转换芯片CS5503数据手册，有需要的朋友可以下来...

能准确测量输入频率，配备相应的C语言程序。-An accurate measure of input frequency, with the corresponding C language procedure.

430 开发板原理图，实用简单适合初学者，适用于多种型号430-430 development board schematics, a simple utility for beginners, is fit for various models of 430

Keil 下编译的基于mcs51单片机的PCA82C250CAN收发器控制的程序源代码。-under Keil compiler based mcs51 MCU control PCA82C250CAN Transceivers The source code.

低成本m48+热敏电阻做多路温度报警装置显示和音乐！

本课题所研究的可存储虚拟示波器定位为低档型，即在性能上只需满足大多场合的基本应用，努力实现小型化，价格尽可能低廉，这样在财力有限的小用户（电子爱好者、小型企业）中能够普及，在大用户的使用中发挥便携性强的优势，与高档示波器配合使用，互相取长补短。-Studied this subject can be stored as a virtual oscilloscope-type low-grade, that is, in terms of performance on most occasions, only to meet the basic application, and strive to realize miniaturization and low prices as much as possible so that limited financial resources to small users (electronic enthusiasts, small enterprises) can be universal, in the use of large users to play a strong advantage of portability, high-end oscilloscope used in conjunction with each other.

51单片机c语言编程实例及一些经验，很实用的。-51 MCU c language programming examples and some experience, it is practical.

提取、刷写飞利浦713X系列电视卡EEPROM（识别码）-Extraction, Writing Brush Philips 713X series tv card EEPROM (ID)

在有线电视中实现程控有源滤波器设计。为了充分利用设备和传输线,需要一种具有频率选择的网络―滤波器,将同一线 路上不同的信号分开,在电视机中也需要不同的滤波器(即选择有用信号,抑制无用信号) 。下面利用8051 单片机与12 位分辨率的DAC1208 数模转换芯片相结合的系统实现时间常数可程控有源滤波器设计,阐述了硬件结构与软件设计-In cable television in the realization of program-controlled active filter design. In order to make full use of equipment and transmission lines, the need for a frequency selective network- filter, the same lines separate different signal in the TV also requires a different filter (ie, choice of useful signals and suppress unwanted signals). Following the use of 8051 and 12-bit resolution digital-to-analog converter DAC1208 chip combining system time constant can be program-controlled active filter design, the hardware structure and software design

单片机atmega16,编译器ICCAVR-SCM atmega16, compiler is ICCAVR