电容表89c52，比较精确，可以自己制作，内带pcb图

C51串口扩展5个源代码，可以弥补51单片机串口不足的缺点，-C51 Serial Port Expansion five source code, it could make up for 51 microcontroller serial shortage of shortcomings,

8019sch网络芯片 带PCB图 8019sch网络芯片 带PCB图-8019sch network chip with PCB Figure 8019sch network chip with PCB diagram

单片机linbus通讯-Single-chip communication linbus

I-WIRE协议的DS18B20程序,用于温度测量-I-WIRE Agreement DS18B20 procedure for temperature measurement

C51单片机学习的程序和教程，同学们看后很快能入门-C51 single-chip learning process and curriculum, students will soon be able to look after the entry

这个是一个数字时钟的程序，是在iar的环境下运行的，可适用于msp430的单片机 -This is a digital clock procedures, iar environment is running under, applicable to the MSP430 microcontroller

无线传感器网络底层驱动程序，针对msp430单片机。-Wireless sensor networks underlying driver for the msp430 single chip.

Silicon Laboratories C8051F320/1单片机例子，PC端调试程序以及驱动程序。-Silicon Laboratories C8051F320/1 Singlechip example, PC-side debugging procedures, as well as drivers.

单片机系统用c语言编写关于简易抢答器的设计- SCM systems c language Responder on the simple design. . . . .

RS-485接口具有较强的抗干扰性，数据传输的距离较远，在一些应用中常常需要把RS-232标准的信号转换为RS-485的标准信号进传输。图中所示电路允许数据在RS-232/RS-485这两个不兼容的串行数据接口间传递。传输速度为480波特时，传输距离可达1750米。图中双RS-232收发器IC1将主机(PC)输出的RS-232电平转换为TTL电平，驱动高速RS-485收发器IC2 的输入，倒相器使IC2、IC3在受到起始位时被激活。-RS-485 trying to lay all the thoroughly bleed at the nose picking up the birthday 扰 fern cavity 强 ， Chu Huai basin cavity beat escapement for the birthday candle远Now ， Which instance, using Beckmannia中