反射式血氧（SPO2）计算

物联网系统的stm32开发代码，包含一氧化碳，温湿度(Internet of Things System)

硬件STM32F407 L298N电机驱动 实现PWM输入电机驱动来实现电子的转速控制(Hardware STM32F407 L298N motor drive Implementing PWM Input Motor Drive to Realize Electronic Speed Control)

矢量传感器的声强法定向程序。利用矢量传感器输出生涯和阵速的相关性，求出平均声强可以提高定向精度的方法。(Sound intensity vector sensors to the statutory procedures. The use of vector sensor array output career and the relevance of speed, calculated the average sound intensity can improve the directional accuracy of the method.)

CAN数据通信测试软件，用于实现CAN总线通信数据的收发和分析(CAN data communication test software for CAN bus transceiver and communication data analysis)

基于STM8的DHT11温湿度计，单总线通讯(DHT11 Thermometer and Humidimeter Based on STM8, Single Bus Communication)

在所考虑的时间间隔内,变化的电流、电压或功率的最大瞬间值。 (In the considered time intervals, change the maximum instantaneous value of the current, voltage or power.)

51单片机的矩阵键盘的介绍，编程实现计算器功能并在led上显示(51 MCU matrix keyboard introduction, programming calculator functions and the led display)

说明：  STM32F103 RS485 DMA方式接收再发送不定长数据，起始和末尾不会有多余数据产生(STM32F103 RS485 DMA transfer and receive variable length data)

锁相环源程序，基于stm32的控制，开发环境用keil5，(Phase locked loop source program, based on STM32 control, development environment with keil5,)

这是一个7279芯片的键盘检测程序，可以供初学者借鉴(This is a 7279 chip, keyboard testing procedures, you can learn from for beginners)