mean_from_rms

开发平台为Keil Cx51,能实现多级菜单，相信会对大家的C51编程又一定的应用价值.(development platform for Keil inverter can achieve multi-level menu, We believe that the C51 will be in a certain programming the application.)

Simple example........

STM8单片机与SHT30温湿度传感器通信程序(STM8 MCU communication to SHT30 temperature & humidity sensor by i2c)

基于c51的i2c数据通信和外围控制，了解I2c的协议和原理()

说明：  一个用于 AD采集的程序和电路,可以直接看到相应的作用(ADC0809)

变压器绕组变形在线监控中考虑套管的影响，有FEM模型的建立和仿真实例(Detecting the early signs of mechanical failures of power transformer winding is necessary and is possible with online monitoring techniques. Online impulse frequency response analysis (IFRA) is a promising diagnostic method when a transformer is in service)

1602显示温度，12B60芯片。。。。51单片机(1602 display temperature, 12 b60 chip... 51 single chip microcomputer)

MSP430F4152硬件IIC实现读写AT24C128，测试通过(MSP430F4152 hardware IIC achieve literacy AT24C128，tested)

说明：  单片机按键识别，用于实现不同的键盘输入的识别与后续操作。(The single-chip button recognition is used to realize the recognition and subsequent operation of different keyboard inputs.)

说明：  113、基于51单片机老人生理智能监控GSM短信 本设计由STC89C52单片机电路+火焰传感器电路+加速度传感器+心率传感器电路+SIM800A_GSM模块电路+电源电路组成。 该系统实时监测老人是否跌倒，是否周围有火以及心率情况。 1、如果火焰传感器检测到火焰，则GSM向特定手机发送：Fire！ 2、如果ADXL345检测到老人跌倒了，则GSM向特定手机发送：Fall！ 3、如果心率传感器检测到老人心率高于120，则GSM向特定手机发送：High Heart！ 4、注意本设计一次上电上述情况每个只能触发一次上报短信，不会连续发送，防止反复发送，请放心使用。 5、短信处理过程有GSM信号灯指示。 6、GSM模块是SIM800A，该模块和SIM900A电路程序完全兼容外观外形一模一样。(GSM SMS for elderly physiological intelligent monitoring based on 51 MCU This design consists of STC89C52 MCU circuit + flame sensor circuit + acceleration sensor + heart rate sensor circuit + sim800a_ GSM module circuit + power supply circuit. The system monitors whether the elderly fall down, whether there is fire around and heart rate in real time. 1. If the flame sensor detects a flame, the GSM sends: fire! 2. If adxl345 detects that an old man has fallen, the GSM sends a specific mobile phone: fall! 3. If the heart rate sensor detects that the heart rate of the elderly is higher than 120, the GSM sends a message to a specific mobile phone: high heart! 4. Pay attention to the design of a power on, each of the above conditions can only trigger a report SMS, will not be sent continuously, to prevent repeated sending, please rest assured to use. 5. SMS processing process is indicated by GSM signal light.)