IoT is the next development in modern life evolving through the present era of smartphones, tablets, and wearables. Connected cars, smart earphones, AI translators, personal assistance systems powered by augmented reality, vehicle tracking, AI-backed video surveillance, and many other embedded applications will become a part of our existence. These billions of “things” need internet connectivity…
Radio Controlled Quadcopter: Construction, Working Principle, and Applications
A quadcopter is a four rotor unmanned aerial drone that operates with the same principle as of a helicopter with slight differences lying within both. It is used for several purposes in the military as well as social fields operating over a wide range of applications.It has become a craze for building a quadcopter among people as it gives a wide variety of benefits as compared to the traditional helicopter such as stability and control. Till date quadcopter has only been used as a drone that is controlled from a distant place.
What is 3D Printing? (Part 1/8)
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.
Bluetooth Protocol (Part 2): Types, Data Exchange, Security
Bluetooth is defined as layered protocol architecture because each layer supports the layer above and below it. The complete protocol stack consists[[wysiwyg_imageupload::]] of both Bluetooth specific protocols which are clearly defined or developed for Bluetooth like LMP and non-Bluetooth specific that were designed to enable the re-use of existing protocols for various functions. Non-specific protocols can be used with many other platforms like WAP, UDP AND OBEX. These were used to speed up the development of Bluetooth protocol at higher layers at the same time adaptation to work with Bluetooth devices and ensure interoperability. Bluetooth protocol comprises of a number of protocols which can be divided into four categories: telephony control protocol, cable replacement protocol, adopted protocol, telephony control protocol. Each of these protocols is responsible for specific type of task and stands on its own. The concept of master, slaves, Pico nets and scatter net forming ad-hoc network. This part of Bluetooth will deal with the protocols responsible for the working of Bluetooth technology.
3D Printing Processes – Sheet Lamination (Part 8/8)
Sheet lamination is one of the seven recognized 3D Printing methods. The process uses sheets of building material which are cut through laser or knife and the sheets are joined one after the other either by using an adhesive or by wielding the laser cut sheets together to form the 3D object. The process is also called ultrasonic additive manufacturing (UAM) in case the building material used is metal sheets.The apparatus for UAM variation of the sheet lamination process has a cylindrical sonotrode to which the material sheet is coiled. The sonotrode is rotated to feed the material sheet onto a building platform.
Bluetooth Protocol (Part 1): Basics and Working
Handheld devices like a cell phone, palmtop and laptop were rapidly becoming an integral part of our daily lives. In most cases, these devices do not have compatible data communication interfaces, or, if they do, the interface requires cumbersome cable connections and configuration procedures. Isn’t it absolutely fantastic to connect your PC to share music, data and calendar info without using any wires? Or to wirelessly access phone numbers on your PDA from your cell phone.
3D Printing Processes – Material Jetting (Part 7/8)
Material Jetting is one of the standard 3D printing technology that has scope and design pattern suitable for the desktop version of 3D printers as industrial 3D printers. The technology fabricates a 3D part just like an inkjet printer prints a two-dimensional image. The 3D model is built on a target surface to which droplets or continuous fluids of the building material are dropped layer by layer and each layer is then cured with ultraviolet radiation to get it solidified. The term “Drop on Demand” is used for referring the drop by drop wise fabrication of 3D model in the technology’s context. A typical apparatus for material jetting 3D printing has printer head consisting of two nozzles and an UV source.
3D Printing Processes – Directed Energy Deposition (Part 6/8)
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.
3D Printing Processes – Vat Photo polymerisation (Part 3/8)
Vat Photo polymerisation is another popular 3D printing process. The process is based on hardening of photopolymers on exposure to the ultraviolet radiation. The photopolymer is in the form of a liquid resin filled inside a Vat, that is why, it got the name Vat Photo polymerisation.Stereolithography was invented in 1986 by Charles Hull at the time when he founded his company 3D Systems. For Stereolithography a Vat is filled with the liquid photopolymer resin. The 3D model is built on a platform which dips into the resin to a depth of a single layer. The height of a single layer is usually 0.05 mm to 0.15 mm. An ultraviolet light source which direct the radiation onto resin by reflection from motor controlled mirrors is mounted at the top of the apparatus.
3D Printing Processes – Material Extrusion (Part 2/8)
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.