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3D Printing can be a household thing in near future. No doubt, you might have heard about 3D Printing more often nowadays. The technology is deemed to be a catalyst for another industrial revolution. The days when 3D printing will be used for mass productions in manufacturing sector may not be far. 3D Printing, which has been in the industry since the late 1980s, earlier more popular by the term Additive Printing, is bound to leap beyond modelling and prototyping application.

There is not one way, 3D printing can be carried out. Currently there are seven standard manufacturing processes recognized by the American Society for Testing and Materials (ASTM). All of these processes are additive in nature and differ only in the way layers are laid out. Efforts are on to innovate new processes other than the additive types but currently only additive manufacturing processes are applicable to 3D printing. Let’s see how Material Extrusion process implements 3D printing.Being an extrusion process, FDM involves a hot end and a cold end. The hot end is an extrusion head to which the fabrication material is supplied by unwinding plastic filament or metal wire off a coil.

VAT光聚合是另一种流行的3D印刷过程。该方法基于光聚合物的硬化对紫外线辐射的暴露。光聚合物是填充在增值税内的液体树脂的形式，即为什么，它得到了名称增值税光聚合。在他创立了他的3D系统时，Charles Hull在1986年由Charles Hull发明了一定的时间。对于立体镀锂缩影，填充液体光聚合物树脂的增值。3D模型基于平台内置，该平台浸入树脂到单层的深度。单层的高度通常为0.05mm至0.15mm。通过从电动机控制镜的反射将辐射指向树脂上的紫外光源安装在设备的顶部。

Binder jetting is one of the seven recognized standard 3D Printing processes. The technique is copyrighted by the name 3DP technology. It was developed at Massachusetts Institute of Technology (MIT) in 1993. Later on, the license of the technology was obtained by Z Corporation in 1995.This is a powder based 3D printing technique and uses a powder like building material to be joined by liquid binder for 3D printing. In a typical apparatus for binder jetting, there are two chambers where one chamber is filled with powdered building material to feed into the other chamber and the second chamber is used for realizing the 3D model. The 3D model is built by gluing together the powdered building material using the liquid binder.

The Powder Bed Fusion is another powder based 3D printing technique. Unlike the binder jet 3D printing that uses a binder liquid to glue together building material’s particles, in powder bed fusion techniques, the particles of building material for 3D part are fused together by the application of heat or electron beam.All the PBF techniques are similar in operation except that the method of fusing the powder material differs in them. In Selective Laser Sintering, a laser head is used to project high power laser beam on the powder material to melt the particles and fuse them together.

Directed Energy Deposition (DED) is a 3D printing technology specifically used to create 3D models from metals and alloys. The technique can be applied for making 3D parts or objects from polymers, glass or ceramics but is not popular for that. This technique is quite commonly used for repair of existing 3D models built using metal or alloy.Many times the technique is used for adding extensions to existing metallic models. The typical apparatus for Directed Energy Deposition 3D Printing consist of a head for material wire supply which can move along multiple axis and an electron beam projector or high power laser beam projector which melts the fed wire through directing the high power radiation.

这是介绍ARM Cortex-M3 LPC1768微控制器的计时器编程的文章。在这里，我们将在LPC1768中初始化计时器外围设备。定时器将提高任何微控制器的使用方式。在本教程中，我们将设置两个定时器，该定时器将根据定时器的设置闪烁两个LED。在本文中讨论了ARM Cortex M3的开发环境。

In the previous tutorial, the basics of Wireless Sensor Networks were discussed. It was mentioned that WSN can utilize many wireless standards and protocols to enable sensor communication with a cloud or server. It was also mentioned that wireless sensors communicate to a cloud or server with the help of a Gateway which performs protocol conversion for the wireless network. Zigbee is one of the standard and protocol which is generally used for WSN deployed in industrial applications.

在上一个教程中，讨论了ZigBee技术及其在构建无线传感器网络中的应用。在本教程中，学习执行简单的客户端以通过ZigBee协议进行客户端通信。将有两个Xbee模块拍摄，将被配置为在空中互相传送数据。Xbee设备通过空气无线地彼此通信。它们本身没有任何微控制器或处理器，因此无法管理所接收或发送的数据。

In the previous tutorial, communication between two PCs was setup over Zigbee Protocol using Xbee modules and XCTU software. In this tutorial, two Xbee module based IoT devices will be designed and configured to communicate with each other over Zigbee protocol. One of these devices in the Zigbee network will be a Coordinator device and the other will be a Router device. The coordinator device will control LED interfaced at the Router device.

In the previous tutorial, IoT communication between two devices over Zigbee protocol was demonstrated using two Xbee modules. The two modules were communicating with each other automatically without any human intervention. The two modules were also operating in transparent mode in the previous project. In this project, an LED light controller is designed where one device controls the LED interfaced at other by communicating data in API mode. In this tutorial, two Xbee module based IoT devices will be designed and configured to communicate with each other over Zigbee protocol

物联网requi有特定的网络rements. The traditional TCP/IP protocols usually do not fit to these requirements. That is why there are many protocols designed especially to cater the requirements of IoT applications. Within the IoT domain, sensor networks are one of the applications which are designed using constraint devices and are characterized by limited network bandwidth. A variant of MQTT protocol has been designed for these networks which is called MQTT-SN (MQTT for Sensor Networks).

在上一个教程中，讨论了MQTT-SN协议的基础知识。有人提到，MQTT-SN网关需要与MQTT-SN代理通信。MQTT-SN经纪商与MQTT经纪人不同。真正的小消息经纪人是流行的MQTT-SN经纪人之一。真正的小消息经纪人（AKA RSMB）是轻量级，低开销MQ遥测传输经纪人（版本3或3.1）或MQTT-SN代理。它是一个PUB /亚基的经纪人。它允许通过在低带宽，有限的处理能力和不同可靠性方面受到限制的网络中的传感器和执行器等微小设备。

A constant current source is used to provide a constant current regardless of the input voltage and output load. These type of circuits are also used as a current limiter. Most electronic devices have a maximum current rating and if current above that rating is drawn by it, the device may get damaged or not work properly. Therefore a lot of times constant current power supplies are required to operate electronic devices. In this project, an adjustable constant current source which supplies 25 mA constant current at the output regardless of load resistance and the input voltage is designed.

在上一个教程中，我们了解到我们需要以下硬件和软件工具来使用Attiny85构建任何应用程序。Arduino IDE软件USB SPI AVR程序员Progisp软件让我们建立第一个LED闪烁，“Hello World”应用于Attiny85 MicroController。打开Arduino IDE。从File - > example-> Basic-> Brike修改...的开放式LED闪烁示例

本教程是具有STM32F103微控制器的PWM（脉冲宽度调制）信号生成的一系列教程的一部分。以前，我们研究了如何使用Keil UVision 5 IDE和STM32Cubemx代码配置器使用STM32微控制器生成PWM信号。我们向前移动了使用STM32F103微控制器的内部定时器产生可变PWM信号。我们研究了关于产生PWM的研究......

In this tutorial i am going to teach you how to control speed of dc motor using stm32 microcontroller and l293d half h bridge control ic. Dc motors are common motors you see in your houses(DC water pumps, DC fans), toys etc. DC motors rotate at a constant speed but their speed can be varied…

在这个项目中，我将使用加速度计和Python脚本演示Ubuntu中的工作空间的交换。我正在使用WMCTRL命令，该命令将根据加速度计值采用参数。硬件级别此项目类似于使用Python脚本和加速度计的控制鼠标指针，您可以在此处查看。正在此处查看正在使用的PyThon库是Pyserial，子过程和Sys。Pyserial用于在Arduino和我的机器之间进行沟通。子进程用于在Python脚本中执行Bash命令，使用sys使用try和除块退出程序。

An amplifier is a circuit which can produce an output voltage, which is the product of input voltage with a value called voltage gain. An op-amp (operational amplifier) is a kind of amplifier circuit which can perform an operation (addition, subtraction etc.) on the input voltages, apart from simply amplifying the input. It is an electronic…

反相和非反相引脚的功能可以简单地说明与反相和非反相引脚的输出与反相销的依赖性，如果与其他引脚相比，如果反相引脚高，则如果非反相引脚是负值，则输出为负数与其他销相比，输出是阳性的......