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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.)

说明：  改程序实现了用microchip公司dspic30f5015实现了PID算法。能够实现对电机的控制。(Reform program with the microchip company to achieve the realization of a PID algorithm dspic30f5015. Of motor control can be achieved.)

说明：  stm32控制温度传感器DS18B20的方法(STM32 control method of temperature sensor DS18B20)

ST7789S-G4A的初始化代码，该IC能够零电容实现2.8寸TFT屏驱动(ST7789S-G4A initialization code, the IC can achieve zero capacitance drive 2.8 inch TFT screen)

说明：  模拟了无人机遇到障碍物自动避障的原理，并且加了大量的注释！(The principle of UAV avoiding obstacles automatically is simulated, and a lot of comments are added!)

LCmeter with pic procesor

3D打印TMC5130驱动程序，修正了原版的错程问题(TMC5130 river for 3d printer, debug missing step problem.)

1. 书中所有源程序, 在CPP子目录下, CPP.EXE是压缩可自释放的文件, 在DOS 下运行该文件即可释放 2. 书中程序的部分演示程序(源程序的编译), 在DEMO子目录下, 运行压缩文件 DEM.EXE释放, 然后运行DEMO.BAT演示 3. 精简UCDOS 3.0汉字系统, 含一个24点阵宋体字库, 在UCDOS子目录下, 运行 UCD.EXE释放。(1. The book all the source code, in the CPP, under a subdirectory, CPP.EXE is available since the release of compressed files, in DOS the file can be run under release 2. Book procedures demo programs (source code compiler), in the DEMO subdirectory, run DEM.EXE the release of compressed file, and then run DEMO.BAT presentation 3. UCDOS 3.0 to streamline the system of Chinese characters, including a 24-dot matrix font宋体in UCDOS subdirectory, run UCD.EXE release.)

巧用C8051F410的PCA实现超声波测距(Using the PCA to achieve ultrasonic ranging C8051F410)

LABjs 的核心是 LAB（Loading and Blocking）：Loading 指异步并行加载，Blocking 是指同步等待执行。LABjs 通过优雅的语法（script 和 wait）实现了这两大特性，核心价值是性能优化。LABjs 是一个文件加载器。(LABjs lets you load pretty much any script file, whether you control it or not, with no intrusion or convention for dependencies, other than the order and blocking that you define. It keeps track of what you ve asked for and what has downloaded, and lets you only define a handler once for a group of scripts that will execute together in parallel. The API style (with chaining) makes is very easy to convert a set of script tags in your page into code to load them, without having to worry that race conditions will cause issues for scripts loading in the wrong order if there are explicit dependencies involved.)