For equipment to monitor the working hours of the next

AT89C51SND1C是AT89C51核心的处理器，包含一个MP3解码器，完全兼容8051的Keil C51编译环境，适合8051使用者的MP3解码应用。-AT89C51SND1C is AT89C51 core processors, includes an MP3 decoder, 8051 is fully compatible with the Keil C51 compiler environment 8051 suitable for user

mega64 +　VS1003 + SD卡，液晶使用的 Nokia5110液晶（方便，可以直接贴在板子上）,，采用手机锂电池供电 配外壳 -mega64+ VS1003+ SD card, LCD used Nokia5110 LCD (convenient, can be directly attached to the board on), the use of lithium battery-powered mobile phones with shell

HD7279与51的驱动，主要修正了延时函数及按键函数，按键采集通过中断采集。-HD7279 51 and the driver, amended the delay function keys and function keys acquisition through acquisition interruption.

Ps/2键盘源代码，为Keil构建工具，用这个程序就可以做键盘了

利用8051驱动GPS模块，实现GPS定位功能。-8051 drivers use GPS modules, GPS positioning function realize.

这是一个PCB常用的封装，特别是对于学单片机的同志来说是不可多得的-This is a commonly used PCB package, especially for school comrades Singlechip is rare

c51文件系统源码-decoder source file system

用51系列单片机演奏音乐的C51源程序(资料)-51 Series single-chip microcomputer with the C51 music source (information)

PXA270平台的键盘应用程序代码~~~~实现4*4键盘全功能-PXA270 platform application code keyboard ~ ~ ~ ~ to achieve 4* 4 full-function keyboard

74HC595的单片机驱动程序。74HC595是一片非常好用的IO扩展芯片。理论上可以无限扩展。-74HC595 microcontroller driver.