For the past few years fingerprint scanners were considered to be a very costly and high end technology. We have seen it only in thriller and sci-fi movies. But now, these devices have been popping up in almost all places like offices, police stations and also our laptops. You also get to buy fingerprint USB […]
What is an Amplifier? We see amplifiers in almost all the electronic equipments around us. Though we usually relate them to stereo equipments they are also found in TV’s, computers, MP3 players and so on. All these devices have a speaker which is used to reproduce the original sound. Related Articles WORKING OF SPEAKERS MOTIONAL
Recycling E-goods All homes in this world have at least one electronic device and may be more. Some of them include computers, video games, mobile phones, printers, MP3 players and so on. When you buy a computer for the first time you use it as though it is the greatest gift in the world. When
Nowadays, there are a lot of touch screen monitors available in the market. They are made available in displays for computers, personal digital assistants, mobile phones and video games. A touch screen contains a visual display area which can be sensitive to the touch of our finger or other passive components. A touch screen
A strain gauge is a device that is used to measure the strain that occurs in an object. The device was invented in the year 1938 by Edward E. Simmons and Arthur Ruge. The device is still being used in many electronic circuits mainly as the principle sensing element for sensors like torque sensors, pressure
In my earlier posts I have already explained the working of Charge-coupled devices and its application as an image sensor. Recently, most of the scanners and cameras have introduced a new image sensor called Contact Image Sensors [CIS]. Working of Contact Image Sensor Contact Image Sensor is one compact module consisting of three sub-systems. They
What is a Scanner? A scanner is a device that is used for producing an exact digital image replica of a photo, text written in paper, or even an object. This digital image can be saved as a file to your computer and can be used to alter/enhance the image or apply it to the
Here we are going to look at how a DVD player works and the essential components for its working. Parts of a DVD Player The DVD player is not only used for playing the data present in a DVD, but also to write the content onto a DVD. To know this process it is essential
After the invention of the Digital Versatile Disc [DVD], the true digital sound effect and high clarity video effects were brought to all homes. But the hunger for high-definition videos and audio along with a high-capacity storage disc led to the invention of the Blu-ray Disc [BD]. They have the same capabilities of a DVD,
What is Flexplay DVD? In most foreign countries, people rent a lot of DVD’s from the shop. All you have to do is watch the movie and return the DVD back within the agreed time. But, if we are pretty much unorganized, we tend to forget about the DVD. This is where the DVD rental
What is a DVD? A Digital Versatile Disc/Digital Video Disc [DVD], is an optical disc storage medium like a compact disc [CD], but with greater data storage and high quality audio and video formats. The clarity, when comparison with a CD is almost six times higher. A DVD can be termed in different ways according
In the blog post on fuel cells I have explained the way hydrogen and oxygen react to produce electricity with water as a by-product. There also some disadvantages with this method. The problems include the improper storing and distribution of hydrogen. What is a fuel processor? When comparing a hydrogen fuel cell to that of
What is a Fuel Cell? Fuel Cell is an electrochemical device that is used to convert an open source fuel into electricity. An electrolytic process has to take place inside a cell in which there is an open source fuel [hydrogen] and an oxidant [oxygen]. Both the fuel and oxidant reacts in the presence of
Sometimes you may be unable to find a particular inductor the market. This is actually a problem faced by most of the electronic hobbyists and the problem becomes more serious if your project is RF related. The inductors required for RF circuits (antenna, tuner, amplifier etc) are almost impossible to find in the market and
Although the below explained process is not applicable for any electronic circuits, you will clearly get a clear idea on how a rheostat works. DIY Rheostat – Components The components needed for the connection are Flashlight bulb and socket [1] Dry cell lantern battery/D-cell battery [2] Wire [About 15 to 17 inches and another one
Potentiometer and Rheostat In this article, the working and circuit symbols of potentiometer and rheostat are explained. The types of potentiometers used and their uses are also explained in this post. Rheostat vs Potentiometer is also explained. I have already explained the working of a variable resistor and its applications in electronic circuits. Here are
Variable Resistors – Working and Applications This article clearly defines and explains the working of variable resistors, the variable resistance specification, types, and applications. Variable resistors find its application in most of the electronic circuits used today. We have been getting a lot of comments with questions on how a variable resistor works and so
The Surface Conduction Electron Emitter Display [SED] is almost similar to a CRT, and hence is easier to explain when compared to a CRT display. Although a CRT display is huge and heavy, the picture quality, viewing angle and also visual artefacts are very much appreciable. Â But, when the combination of the picture quality of
Before going to the depth of this article, there are a few basics that you should know. Especially, about the exact working of electricity. Electricity mainly depends on three parameters. They are voltage, current and resistance. These three parameters are related to each other and a proportional change occurs to these parameters, when a change
When a person is buying a product, he always tries to buy the best one, available at the most affordable prices. This is where the proble starts for both LCD and Plasma displays. Both of them are equally good displays with some advantages as well as disadvantages. Let us compare both of them with respect
The basic of any television is the Cathode Ray Tube [CRT]. We have been using this technology for the past 75 years. But there are a lot of disadvantages for a CRT. The display lacks in clarity, Â and the size of the screen is huge. They become bulkier in size with the increase in screen
We cannot think of a world without batteries. We use batteries for our everyday use like mobile phones, digital cameras, remote controls and so on. But still we cannot tolerate the fact that these batteries die with time. They may have to be either replaced or recharged. Some of them are even heavy as well
Flash Memory We use our computer hard disk to store all our files including documents, photos, PDF’s, MP3’s and so on. But, there are cases where you will need to store information in a much safer platform than your hard-disk. A device which can be carried around and can be easily interfaced with your PC
 Resistors Resistors are considered to be the most used and the most important component of all the electronic circuits. Take a look at the working, types and also use of resistors in the field of electronics. We know that the basic idea of any electronic circuit is the flow of electricity. This also is
Have you ever thought of having a high-definition TV that is bigger than your usual LCD display, and that consumes only half the power of an ordinary one? What if you could easily roll the TV and pack it up so that you can use it for a trip? Yes, this is possible with the
