el817

经典的基于密度的DBSCAN算法，注释详细(Classic DBSCAN algorithm based on density, detailed notes)

DL645协议解析程序，调试通过，需要的朋友可以下看看，有什么问题欢迎讨论。(DL645 protocol parser, debugging passed by the friends can next see any problem welcome to the discussion.)

基于氮化镓的双BOOST电路，大功率UPS前置PFC电路(BOOST AND PFC)

在STM32CubeMX+TrueStudio环境使用串口打印printf内容。(Use USART show printf, under STM32CubeMX+TrueStudio environment.)

STC89C52八位密码锁论文，包括制作资料和原理图/PCB/BOM,及C代码。可做成实物(STC89C52 eight locks papers, including the production of information and schematic/PCB/BOM, and C code. Can be made in kind)

说明：  7290显示 7290显示 7290显示(7290 show revealed 7,290 7,290 7,290 showed 7290 show revealed)

晨星Mstar的MST703参考手册。 MST703是一款性价比非常高的视频解码器及小尺寸TFT液晶屏驱动芯片，外围电路简单。(Mstar MST703 Reference Manual. MST703 is a very high cost of video decoders and small size TFT LCD driver chip, the external circuit is simple.)

ADC采集信号通过DMA双缓存模式读取，经串口发出(The ADC acquisition signal is read through the DMA double buffer mode, and is sent through the serial port.)

说明：  实现正常时钟功能，带时间日期，三组闹钟，键盘显示(流程图，配合程序使用)(Realize normal clock function, with time and date, three sets of alarm clocks, keyboard display)

单片机基础c语言之条件编译,基础的。可以作为入门的了解知识。(Conditional compilation of basic C language of single chip computer.)