电子图书《华中理工大学出的C51教材》，很不错的。

ALTERADE2开发板一个网络芯片DM9000A的应用范例-Development board ALTERADE2 a network chip DM9000A Application Example

基于超声波的测距仪（包括原理图，程序源码与相关调试说明，以及一些参考资料，总之，开发超声波测距仪的一整套资料）-Based on Ultrasonic Range Finder (including schematics, source code and related procedures for debugging instructions, and some reference materials, in short, develop a set of ultrasonic range finder data)

基于AVR单片机 MEGA16的温度采集源程序，采用ds18b20实现-AVR-based single-chip temperature MEGA16 source acquisition, the realization of ds18b20

显示数据处理（拆数字）.mcu控制LCD显示数字时的拆数程序，可拆int型整数和float型浮点数，所拆数存放于全局变量 数组中。-Show the data processing (down figure). Mcu control the LCD shows the number of figures at the time of demolition procedures, removable int type integer and float-type floating-point numbers, the demolition of a few global variables stored in the array.

PS7219单片机显示的源程序-PS7219 show the source SCM

随着精准农业的发展，农业种植和农业研究人员需要一种手持式NDVI测量仪，以便对农作物长势进行定量测量。本文讨论了一种手持式NDVI测量仪的完整设计过程，详细论述了设计原理，并给出了详尽的单片机程序、设计电路原理图及PCB图。该NDVI测量仪采用太阳光作为光源，光电探测器采用滤光片和光敏二极管实现，用AT89C51单片机控制。其具有结构简单、成本低、轻便、低功耗的特点。-With the development of precision agriculture and farming, and agricultural researchers need a handheld NDVI measuring instrument, in order to crop growth for quantitative measurement. This paper discusses a handheld meter NDVI the integrity of the design process, discussed in detail the design principles, and gives a detailed SCM procedures, circuit schematics and PCB plans. The NDVI measuring instrument used sunlight as a light source, photodetector using filters and photodiode realized, with AT89C51 control. Its structure is simple, low cost, lightweight, low-power characteristics.

pic16f877a使用iic总线方式驱动低价温度芯片tc74，并液晶显示的一个程序，板上验证通过，可以直接使用，令附tc74中文资料-PIC16F877A using the IIC bus driven low temperature chip tc74, and liquid crystal display of a procedure to verify through the board, you can directly use, the attached information tc74 Chinese

51单片机与MAX 7219连接，可一次性驱动8位数码管，绝对正确-MAX 7219 with 51 single-chip connections can be a one-time 8-bit digital tube-driven, absolutely right

热电偶的冷端补偿和线性化.pdf 网上搜下来的，-Thermocouple cold junction compensation and linearization. Pdf

8051 编写的源程序-8051 prepared by the source