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protel LIB 原理图库文件，包含常用元件及stc单片机元件图。(protel LIB)

基于51单片机的12864显示的音乐播放器(12864 displays based music player)

锁相环用于电机转速精准检测，资料很不错，值得下载(Phase-locked loop for accurate detection of motor speed)

Scratch pad register offsets used by the host to communicate device page DMA address to the card.

avr单片机写的简易电压表的程序。测量精度达到12位(avr microcontroller to write a simple voltage meter program. 12-bit measurement accuracy)

利用C-C++语言编程，实现电子钟的整点报时（从离整点的前9秒开始），并伴随音乐声(The use of C-C++ language programming, electronic bell the whole point of time (from the point from the whole nine seconds before the start), and accompanied by music)

STM32 的GPIO操作示例程序代码, 试用与Keile环境STM32F103代码(STM32 GPIO operation code)

说明：  ds2438电源检测芯片初始化，数据读取。(DS2438 power supply detection chip initialization, data reading.)

说明：  金属探测器课程设计资料，里面有电路图和源程序，课程设计论文(Course design materials for metal detectors, including circuit diagrams and source programs, course design papers)

说明：  ST7567 SPI 51驱动测试代码,此代码验证成功，主要是点亮屏幕显示。(ST7567 SPI 51 drive test code, this code verification is successful, mainly to light up the screen display.)