some pdf files describing about PLC concepts and components.

基于snd1c芯片的mp3播放器源代码-snd1c chips based on the MP3 player source code

DP-51H下载仿真实验仪提供80C51与接口实例.ZLG7290例程*-DP-51H download simulation Instrument Interface for 80C51 with examples. ZLG7290 routines*

介绍也利用MAX232芯片实现单片机和PC间的通信-Also introduce the use of MAX232 chip MCU and PC communication

Texas Instrument led on using single switch.

基于xscale的远程传输映象文件到flash里，通过以太网进行传输-XScale-based long-distance transmission image files to flash, the adoption of Ethernet transmission

CANBUS avr driver library

该项目工程与最新的 GSM 和 GPS 技术。这些项目包括 GPS 和 GSM 调制解调器。该项目工程与最新的 GSM 和 GPS 技术。这个项目包括 GPS 和 GSM 调制解调器"车辆跟踪服务"指一种电子设备，通过使用全球定位系统 （GPS），数据报告其位置的设备接收从 GPS 卫星。此设备被安装在车与天线和跟踪的车辆。GPS 控制和处理的计算机系统。该装置由一个微控制器的接口与一个全球定位系统、 GPRS 模块组成。

液晶模块LCD2X8C驱动程序，自带汉字库，无需程序开发者自己编码，使用简单-LCD2X8C LCD driver and carrying Store without developers own coding, simple to use

how to use si labs microcontroller SPI interface

FPGA DE2开发板  实验2第一部分VHDL硬件语言练习源码 Part II You are to design a circuit that converts a four-bit binary number V = v3v2v1v0 into its two-digit decimal equivalent D = d1d0. Table 1 shows the required output values. A partial design of this circuit is given in Figure 1. It includes a comparator that checks when the value of V is greater than 9, and uses the output of this comparator in the control of the 7-segment displays. You are to complete the design of this circuit by creating a VHDL entity which includes the comparator, multiplexers, and circuit A (d