Invention History of the Telephone and the Controversies

john December 10, 2013 No Comments
The wonderful invention of the telephone is the result of work done by a number of individuals, the history of which involves a collection of claims and counterclaims. The ultimate development of the modern electrical telephone involved a range of lawsuits founded upon the patent claims of quite a few individuals and a lot of companies. The invention history of the modern telephone starts in the year 1844 from the conception of the idea of an electric voice transmission...
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The Story Behind the Invention of Field Effect Transistors

john December 10, 2013 3 Comments
No one can certainly imagine any electronic device without the presence of transistors. In that case, what was the idea behind the invention of transistors? Who were the people behind its invention and advancements? What was the real purpose behind the invention of field effect transistors? And how did it emerge? What are the current applications and advancements of these transistors? Have you ever wondered about these? If yes, then this write up will help you in knowing more...
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Invention Story of Mobile Phone

john November 28, 2013 4 Comments
Mobile phone, the most common gadget in the present era, is considered as the greatest gift to the mankind. Can you ever imagine life without this device? No wonder the mobile phone has become an indispensable part of our lives. Of course, the origin of this gadget is as interesting as its use. Starting from bulky devices that were as long and heavy as one’s forearms to ultra thin and techno savvy handsets, the mobile phones have certainly covered...
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The Story Behind the Accidental Invention of X-Ray

john November 26, 2013 No Comments
When people go to a doctor for some pain or abnormality, the very first word the medical practitioner utters is ‘It is better to take an X-ray scan, because only then I can come to know the exact problem.” Well, have you ever wondered what X-rays are and who was the great mind behind this? Read further to have an elaborate view on the invention and inventors of the X-ray. Before getting to know about the history of invention,...
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The Invention History of Fuel Cells

john November 23, 2013 No Comments
Without energy, would anything exist in the world? Living organisms like you and me and the flora and the fauna require some form of energy to survive. A bike, car, motor, television, everything requires some energy to start up, accelerate and even to stop. Thus, form of energy required for the survival or for the sustainability is termed as the fuel energy. The fuel may be any form of energy. Say for example, the food we consume may be...
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Invention Story of Fiber Optics

john November 28, 2013 2 Comments
There are people who always want to learn more on what they use and what they employ in day to day life. If you are into such a pool of people, then here is a perfect write up that will make sense over the story behind the invention of fiber optics. The article is centered on the people involved who dedicated their thoughts and energy over the creation of fire optics. There must be controversies in every single action....
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Interfacing dot matrix LED display to 8051

admin November 13, 2013 15 Comments
Interfacing dot matrix LED display to 8051 microcontroller. LED dot matrix display. An LED dot matrix display consists of a matrix of  LED’s arranged in a rectangular configuration. The desired character or graphics can be displayed by switching ON /OFF  a desired configuration of LED’s. Common display configurations available are 7×5, 8×8, 7×15, etc. LED dot matrix can be used in simple display applications where the resolution is not a big concern.  The figure below shows the arrangement of...
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The Story Behind the Discovery of Electromagnetism

john November 21, 2013 4 Comments
Electromagnetism Once, a naughty child took a little chalk to his teacher. He asked what it was made of. The teacher answered that it was made of atoms. Then, the teacher continued that the atoms were made of electrons, protons and neutrons. The child interrupted and questioned if the chalk is really made of atoms and the rest of the jargon words, why the atoms are not separated and how they are united. The teacher threw a gentle smile...
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Invention Story of Electrocardiography (ECG) by Willem Einthoven

john November 7, 2013 No Comments
Invention of Electrocardiography (ECG) Have you ever wondered about how medical tools and equipments were designed? Ever raised a question if they were designed by a physician himself or a mechanical scholar? If yes, here is an interesting article that will fit your inquisitive nature. Hope you would have come across this device, the most essential electronic medical device, the Electrocardiogram or ECG. Read further to know about the invention story behind this most useful tool. Let us start...
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Invention History of Phototransistor and Photodiode

john November 6, 2013 1 Comment
Before touching the main topic of the invention history of the phototransistors, it is important to have a basic understanding on what phototransistors and photodiodes are. In simple words, a phototransistor is a transistor operated by light rather than electric current. In brief, a phototransistor is a bipolar transistor enclosed in a transparent case so that light can reach the base collector junction. This being the case of phototransistors, a photodiode is a kind of photo detector that is...
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Microprocessor – Invention History & Story Behind the Success of Intel

john November 5, 2013 1 Comment
Microprocessor – Invention History A simple integrated circuit that carries the central processing unit of a computer is the Microprocessor. Are you not fascinated to know what the history behind the invention of this tool is? If yes, this write up will help you know completely about how it was designed and the brains behind the scene. Before you know about the invention history of a microprocessor, let us check out what a real microprocessor is and what it...
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Invention History of Liquid Crystal Display (LCD)

john November 5, 2013 5 Comments
The history and development of the Liquid Crystal Display (LCD) is rather complex. The story of the LCD had an unusual beginning by an Austrian botanist in the 19th century. Though the LCD made a different and unstable start, its development proceeded from early successes like the pocket calculator to the key milestone of a flat panel television display that can be hung on a wall. The origin and development of the LCD spans the world’s major industrial centers...
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Invention History of C Programming Language and the Development of UNIX

john October 31, 2013 6 Comments
Invention History of C Programming Language There would be no surprise in saying that the C language literally shook the computer world? The impact of C cannot be underestimated because it completely changed the perspective with which programming was approached. The birth of the C language was a direct result of the need for a structured, efficient and a high level language that was capable of replacing the assembly code when creating systems programs. On the whole, The C...
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Invention History of Light Emitting Diode (LED)

john October 31, 2013 4 Comments
Most of us are aware that the semiconductor light-emitting diode or the LED is the major component of today’s technology. All our houses have plenty of tiny glowing indicators provided by LEDs; these indicators are employed for various aspects like reading CD and DVD disks in computer and game console drives or to transmit signals from remote controls to electronic equipment. Cars that are equipped with LED indicators are increasing in number these days. Most significantly, it should be...
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Capacitors – Invention History and the Story of Leyden Jar

john October 25, 2013 No Comments
Capacitors are a great example to prove the fact that even the simplest of devices can become complex over the years; in case of capacitors, it is nothing more than an insulator between two conductors and it has become pretty complex in this 250 years of technical evolution!! Almost all of us are familiar with the static charge that is generated by friction – a phenomenon known as triboelectricity. When you walk on a carpeted floor, pull a transparent...
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Radio-Invention History & The Story of Fight for Patents

john October 24, 2013 No Comments
Radio – Invention History The invention history of the radio is not only interesting but rather long as well. If you ask who invented the radio, probably you will get the name Marconi. But, was it really Marconi who invented the radio? Well, you have to determine for yourself after going through the journey of the invention history of the radio. There are a lot of knots to be untangled if you want to arrive at an answer as...
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Microcontroller – Invention History and Story Behind the Scenes

john October 23, 2013 4 Comments
Invention History of Microcontroller Would you believe that each one of you is using at least 20 microcontrollers in your house??!! Well, that’s a fact. There are more than two billion microcontrollers being produced every year. Almost everybody in developed as well as developing nations cannot think of a day without using microcontrollers. The microcontroller is an embedded computer chip that controls most of the electronic gadgets and appliances people use on a daily basis, right from washing machines...
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Image Representation in MATLAB – How to Represent Binary,Grayscale & Color Images

Avaneet Ranjan October 23, 2013 1 Comment
In this article, we are going to talk about images, their types and some basic functions for Images. This article is part of our MATLAB tutorial series, which we are developing for Image processing through MATLAB. We expect you to give us feedback, so that we can keep the information flow more efficient, informative and up to the mark. In the first chapter, you have learned an introduction to MATLAB and its commands. In this chapter you will learn how...
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Object counter using 8051

admin January 23, 2018 27 Comments
Object counter using 8051 microcontroller. This article is about a simple object counter/visitor counter using 8051 microcontroller . AT89S51 belonging to the 8051 family is the microcontroller used here. This circuit can count the number of objects passing across a line , number of persons passing through a gate/door and so on. The can be simply divided into two sections i.e. the sensor section and the display section. Sensor. The sensor part consists of a ultra bright led (with...
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Zener Diode – Invention History & Story Behind the Development

john October 2, 2013 1 Comment
As we all know, a Zener Diode is used for regulating voltage in practical circuit applications. Though we know about the importance of this device, do we really mind knowing about how it was invented? If you had that query in your mind, then reading further would give you a thorough knowledge on the discovery of Zener Diode and its properties. You shall also be informed of the great scientists who worked on this device. Before going into the...
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Shockley Diode – Invention History

john October 2, 2013 No Comments
What is a Schockley Diode? In simple terms, a Shockley diode is a four layered semiconductor diode. In electronic terms, it is a “P-N-P-N” diode and is equivalent to a thyristor with a disconnected gate. Though this basic diode does not find much application in electronic circuits nowadays, the concept is largely employed and is one of the remarkable inventions in the history of electronics. The interesting history of the Shockley diode cannot be interpreted without mentioning a few...
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Digital Count Down Timer using PIC Microcontroller

mithun_das October 3, 2013 17 Comments
In this article, our author Mithun has developed a 0 – 99 min counter using PIC microcontroller 16F628A. So basically this is a digital count down timer ideal for engineering and diploma students for their project requirements. We have given complete circuit diagram of the digital count down timer along with full source code. In addition, photographs of the breadboard setup is uploaded. Every micro controller has a timer unit inside. A timer is nothing more than a time...
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Digital Voltmeter using Micro Controller PIC16F73A

mithun_das October 2, 2013 11 Comments
In this article, we have come up with a new PIC micro controller project. Our author Mithun has created a Digital Voltmeter Circuit using PIC16F73A and multiplexed 7 segment displays. The circuit is well explained with diagrams and the source code (written in Embedded C language) is available for download.  If you have any doubts while implementing this project, please feel free to ask in comments. Note:- You may also like to read our Digital Voltmeter using 8051 created...
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DatasheetLib – A new Datasheet Database Website to revolutionize Datasheet Discovery

jojo September 23, 2013 1 Comment
Electrical engineers all over the world would bet anything for a better datasheet search engine. Its such an under served  market that there are still rooms for improvement. Although there are hundreds of websites which supplies datasheets in the form of PDF like DatasheetCatalogue, AllDataSheet and many others, recently launched DatasheetLib follows a different approach from the existing players. In this article my aim is to compare different datasheet providing websites and see how they all are different from...
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Solar Cell – Invention History & Story – From Selenium to Silicon

jojo September 20, 2013 4 Comments
Invention History of Solar Cells – From Selenium to Silicon Well, the definition of a solar cell is simple. It is a device that directly converts the energy from sunlight into electrical energy. However, its horizons are really vast. The most significant fact is that the invention of this wonderful device didn’t happen overnight. Interestingly, the concept of solar technology is nearly three millenniums old. The first use of this wonderful technology dates back to 7th Century BC. First...
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