usbdisk

按键的去抖以及按键弹起时读按键 (Reading keys key debounce and key bounce)

采用8位MCU的燃气点火器的源程序，采用汇编程序编写(8-bit MCU gas ignition source, using assembler programming)

PLL锁相环 输入三相电压电流 输出电角度 DQ轴电压电流(Phase Loop Lock Input: 3_phase voltage¤t output: angle & DQ-axis Voltage&Current)

51单片机数字钟程序，数码管显示时分秒，按键切换显示日期，包含闰年处理。(51 microcontroller digital clock program)

超声波测距仪设计文档，本设计主要是以74LS04和CX20106A为测距模块，DS18B20用于温度补偿，12864液晶显示，HC-SR04为超声波显示板，语音模块由音频功率放大器LM386、语音芯片WT588D、低压差电压调节LM1117组成。(Ultrasonic range finder design documents, the design is mainly based on 74LS04 and CX20106A ranging module, DS18B20 for temperature compensation, 12864 LCD, HC-SR04 ultrasonic display boards, voice module consists of audio power amplifier LM386, voice chip WT588D, LM1117 low dropout voltage regulator components.)

基于stm32单片机的全彩光立方的代码，注释清晰，拿来学习。(STM32 microcontroller based on the Quan Caiguang cube code, clear notes, to learn.)

51单片机编写的网络节点 自组织无线网络(51 single written self-organizing wireless network nodes network)

数字时钟显示时间、定闹钟及整点报时，还能实现时钟界面的切换功能(Digital clock displays the time, set the alarm and hourly chime)

Freescale单片机S12XS嵌入式开发，通过单片机上的PIT模块定时器，实现跑马灯效果。(Freescale the microcontroller S12XS embedded development, PIT module timer on the microcontroller to realize the marquee effect.)

说明：  利用压电超声导波时间反转法的管道结构裂纹监测研究(Study on the Crack Monitoring of Pipeline Structures Using Piezoelectric Ultrasonic Guided Wave Time Reversal Method)