Double-two-way-voltmeter

pcf8563 lcd1602 ds18b02 stc89c52rc对系统精确定时 报警 采集温度(pcf8563 lcd1602 ds18b02 stc89c52rc precise timing of the alarm system collected temperature)

YL_3串行数码管显示时钟，74HC595，8位，显示时分秒，自动计数。(YL_3 serial digital display clock, 74HC595, 8 bit display minutes and seconds, automatic counting.)

MSP430实现的多级菜单功能，采用OLED实现，占用Ram量较少(MSP430 realize multi-level menu functions, the use of OLED achieved occupancy of less Ram)

jm20316移动硬盘盒---原理图，PCB板图。非常好用的资料(jm20316 HDD Enclosure--- schematics, PCB board map. Very useful information)

说明：  有关程控之类的代码以及个人的仿真图供大家学习参考(The kind of code, and programmed the simulation diagram for your personal reference learning)

对矩阵键盘的程序编写，详细地讲述了如何扫描键盘的输入！(The matrix keyboard programming, detailed tells the story of how to scan the keyboard input!)

hs108单片机控制两个MC44BS373CA实现载频为30MHz和50MHz的I2C通信(hs108 MCU control two MC44BS373CA achieve carrier frequency of 30MHz and 50MHz of I2C communication )

51单片机的串口通信程序，来自于开发板，VC环境下编写。(51 the Serial communication program, and from the development board, VC environment prepared.)

51单片机加1602显示计算器C语言源码 可以实现加减乘除，有负数计算 (51 MCU plus 1602 display calculator C language source code Can have negative calculation add, subtract, multiply and divide.)

西南交通大学图形学实验的第二个，响应键盘的系统键和非系统键(Second, the system in response to keyboard keys and key non-system experiments Southwest Jiaotong University Graphics)