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说明：  手机 监控智 能农场 温度 湿度 光照(Mobile phone monitoring of temperature, humidity and illumination in smart farms)

单片机时钟编程，包括秒表，时钟以及闹钟，亲测可用，包括DSN文件(Microcontroller clock programming, including a stopwatch, clock, and alarm clock, pro-test are available, including DSN file)

（转载）经过测试可用的DLT645-2007 多功能电能表通信协议与封装实现 # DLT645-2007 多功能电能表通信协议解析 * 实现对dlt645 2007版规约想着数据类型的定义 * 提供帧数据的封装及解析相关api (dlt 645-2007 meter device)

最简单的读取AD值的程序。初始化时调用初始化程序，运行过程中，可以定时读取AD值。可以用做温度检测或者电压检测。(The simplest program to read AD values. Initialization call initialization program, running process, can read AD value at regular intervals. It can be used for temperature detection or voltage detection.)

51单片机控制ADC和DAC转换的程序，仅供参考(51 MCU control ADC and DAC conversion process, for reference only)

说明：  在传统矩阵变换器和多电平逆变器的基础上,提出一种新颖的多电平矩阵变换器,介绍了其拓扑结构和工 作原理.多电平矩阵变换器的能量传递,是通过三相输入电压对中点电容充电到一个恒定直流电压而实现的.选择适 当的控制算法和电容电压,能在变换器的两侧合成低次谐波含量小且波形近似于正弦的可控输入/输出电压.对多电 平矩阵变换器进行建模和仿真,并探讨了其输出能控性. ( On the basis of a conventional matrix converter and a multilevel inverter, a novel multilevel matrix converter is proposed, and its topology configuration and principle are introduced. This converter operates as a bidirectional converter and transfers energy between its two sides by charging the midpoint capacitors to a known constant DC voltage level. Proper selection of control algorithms and capacitor voltages helps synthesize controllable and waveforms almost sinusoidal three-phases AC voltage with minimum low-order harmonics at both sides of the converter. The multilevel matrix converter is modeled and simulated with its output controllability discussed. )

本产品是一个具有音量控制的IC。 void I2C_start(void) { EA=0 PTDAT=1 PTSCL=1 SomeNOP() PTDAT=0 SomeNOP() PTSCL=0 } static ...

变压器（Transformer）是利用电磁感应的原理来改变交流电压的装置，主要构件是初级线圈、次级线圈和铁芯（磁芯）。主要功能有：电压变换、电流变换、阻抗变换、隔离、稳压（磁饱和变压器）等。按用途可以分为：电力变压器和特殊变压器（电炉变、整流变、工频试验变压器、调压器、矿用变、音频变压器、中频变压器、高频变压器、冲击变压器、仪用变压器、电子变压器、电抗器、互感器等）。电路符号常用T当作编号的开头.例: T01, T201等。(A transformer (Transformer) is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilizing (magnetic saturation transformer) and so on. It can be divided into power transformers and special transformers (electric transformer, rectifier and transformer, power frequency transformer, voltage regulator, mine change, audio transformer, intermediate frequency transformer, high-frequency transformer, shock transformer, transformer, transformer, reactor, intersenser, etc.). Circuit symbols usually use T as the beginning of numbering. Examples: T01, T201 and so on.)

变压器保护包括变压器差动保护，变压器内部保护，变压器外部保护，里面有其simulink仿真模型以及相应的数据分析(The transformer protection including transformer differential protection, internal protection of the transformer, the transformer external protection, which simulink simulation model as well as the corresponding data analysis)

cfd simulation for heat transfer and mass transfer problems