DigitalMeter_src

51单片机控制SD卡，并将SD卡中的字符分割存入数组，为下一步开发做准备。(51 MCU control SD card and SD card characters split into an array, to prepare for the next development.)

STM8L 先ADC测量vcc然后再串口发送数据(STM8L first ADC to measure VCC, and then send data to the serial port)

说明：  抢答器 实现抢答可以自己编程实现很多人同时抢答 有用 可以试试(Quick answer implement Quick answer can be programmed to achieve a lot of people at the same time Quick answer useful can try)

说明：  恩智浦KEA驱动库，代码搬运，可以参考学习，仅供参考。(En Zhipu KEA driver library, code handling, you can refer to learn, for reference only.)

说明：  pda project using pda

MICROCHIP 单片机PIC18F87K22，SST25VFxx_Flash存储测试程序，摘自网络,亲自验证有效。(MICROCHIP microcontroller PIC18F87K22 SST25VFxx Flash storage test procedure, the network, personally verified effectively.)

基于nordic soc蓝牙芯片开发的双串口例程。(There is a demo project, which based on ble_app_uart, please place the project under SDK13/examples/ble_peripheral.)

cx20106a 索尼的芯片 现已停产 不过算是非常经典的一款用于超声波接收处理的芯片，想做超声波模块的可以下载看看(cx20106a Sony chip has been discontinued, but which is a classic of a receiver for ultrasonic processing chip, the module can be downloaded want to see ultrasound)

说明：  包含proteus仿真文件及c语言程序，在开发板上进行过运行。利用双色LED显示电路，和四位静态数码管显示电路模拟十字路口交通信号灯。4位LED数码管显示时间，双色LED灯显示红绿灯状态。熟悉交通信号灯控制逻辑。设计一个十字路口的交通灯控制电路，要求南北方向和东西方向两个交叉路口的车辆交替运行。每次绿灯变红灯时,要求黄灯先亮3S,才能变换运行车辆。东西方向、南北方向车道除了有红、黄、绿灯指示外，每一种灯亮的时间都用数码管显示器进行显示（采用倒计时的方法）。考虑到特殊车辆情况，设置紧急转换开头。(It contains proteus simulation file and C language program. It has been run on the development board. Two-color LED display circuit and four-bit static digital tube display circuit are used to simulate traffic lights at intersections. Four-bit LED digital tube display time, two-color LED lights show the status of traffic lights. Familiar with traffic signal control logic. Design a traffic light control circuit at the intersection, which requires the vehicles running alternately in the north-south direction and the East-West direction. Every time the green light turns red, the yellow light is required to turn on 3S before changing the running vehicle. In addition to the red, yellow and green lights in the east-west and North-South lanes, the time of each kind of light is displayed by digital tube display (countdown method). Considering the special vehicle situation, set up the emergency switch start.)

基于STM32F429实现以太网应用--LWIP移植(无操作系统)(Implementation of Ethernet Application Based on STM32F429--LWIP Porting (No Operating System))