IMAX – The Giant Step to Movies

Let a movie be in 3-D or an ordinary 70mm projection. We have always loved it for the story, sound effects, visual effects, and many other factors. But latest technologies have improved the way in which graphics and other effects have been introduced in each frame. Out of them IMAX is the most popular. The Fox introduced the first 70mm format, the Fox grandeur in 1929. Later the Cinema scope and vista vision widened the image from 35mm. Then came IMAX with its advanced methods of film projection ever to be seen by anyone. The format was developed by a…

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MOS – Controlled Thyristor (MCT)

Out of many semiconductor controlled devices, MCT is considered to be the latest. The device is basically a thyristor with two MOSFET’s built into the gate structure. A MOSFET is used for turning ON the MCT and another one is used for turning it OFF. The device is mostly used for switching applications and has other characteristics like high frequency, high power, and low conduction drop and so on. An MCT combines the feature of both conventional four layer thyristor having regenerative action and MOS- gate structure. In this device, all the gate signals are applied with respect to anode,…

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Transformer

Most of the electronic circuits used in Circuitstoday.com have different applications of the transformer. Therefore, it is important to know the working principle, construction and types of transformers used in different analog circuits. Transformer – Working Principle A transformer can be defined as a static device which helps in the transformation of electric power in one circuit to electric power of the same frequency in another circuit. The voltage can be raised or lowered in a circuit, but with a proportional increase or decrease in the current ratings. The main principle of operation of a transformer is mutual inductance between…

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Modulation

When audio signals are transmitted over thousands of kilometres through radio transmission, the audio frequencies that lie within the frequency range of 15 Hertz to 20 KiloHertz has very small signal power and thus cannot be transmitted via antenna for communication purposes. The radiation of electrical energy is only possible at frequencies above 20 KiloHertz. The main advantage of high frequency signals is that they can be transmitted over very long distances by dissipating very small power. Thus, the audio signals must be sent along with the high frequency signals for communication. This can be done by superimposing electrical audio…

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PCB Manufacturing Process

A PCB is used to connect electronic components electrically. This is done by making conductive path ways for circuit connections by etching tracks from copper sheet laminated onto a non-conductive substrate. A PCB consists of a conducting layer that is made up of thin copper foil. The insulating layer di-electric is laminated together with epoxy resin prepreg. The most commonly used PCB type is the FR-4. Boards may be single sided or double sided. Double sided PCB can be used to connect electronic components on both sides through through-hole plating. This is done by copper plating the walls of each…

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TeraHertz Transistors

Terahertz transistors are the new generation semiconductor transistors developed by Intel Corporation. The researchers in Intel had developed a new transistor structure that maintains Moore’s law and would lead them into the discovery of these high speed new generation transistors. The terahertz transistor basically has higher speed (in GHz), High power efficiency, and high heat reduction capacity. These transistors have a fast switching rate of more than trillion times per sec. They also have the capability to perform 50 to 100 times faster than normal traditional transistors. The first terahertz transistor was only capable for handling 3GHz. But the latest…

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Metal Oxide Varistor (MOV)

Metal Oxide Varistor (MOV) Basics of Varistor A varistor/voltage dependent resistor (VDR) is a component which has a voltage – current characteristics that is very much similar to that of a diode. This component is used to protect electrical devices from high transient voltages. They are planted in the devices in such a manner that it will short itself when a high current is produced due to the high voltage. Thus the current dependent components in the device will remain safe from the sudden surge. I have already explained in detail the working and applications of a variable resistor [varistor]….

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Working of Standing Wave Ratio (SWR) Meters

Working of  SWR Meters This article focuses on the concept of Standing Wave Ratio, its measurement using SWR meters, directional swr meter, Voltage Standing wave ratio (vswr), Swr bridge circuit, applications and problems with an SWR meter. SWR Meter IMAGE SOURCE SWR meters are used to measure and denote the standing wave ratio in a communication line. That is, the meter will denote the exact mismatch between the transmission line and the load, thus helping to know the degree of effectiveness of the impedance matching efforts. Standing Wave Ratio To know more about SWR Meter, it is necessary that you…

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Smart Antennas

What is a Smart Antenna? Smart Antennas, also known as multiple antennas, adaptive array antennas, and so on is used to increase the efficiency in digital wireless communication systems. It works by taking the advantage of the diversity effect at the transceiver of the wireless system that is the source and the destination. The term diversity effect refers to the transmission and reception of multiple radio frequencies that are used to decrease the error during data communication and also to increase data speed between the source and the destination. This type of technology has already found its significance in most…

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RedTacton Technology

RedTacton Technology This detailed article on Red Tacton technology is developed by our team for students as a Seminar topic for their academic needs. We have referenced various research papers,reports and other documentations for developing this article. We have discussed about various infrared and Bluetooth wireless technologies in our recent posts. But the technology has been advanced that these technologies have been overrated. Now, researchers are trying to develop a new path for transmission of signals called Human Area Networking. As the name indicates, such a technology will have the human body surface to transmit and receive signals at very…

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