Diode

I first realized I wanted to pursue a career in Electronics Engineering when I took an Electronics class in high school. I got interested in how electricity works in all the technology that we use today in our modern world. I was also curious about how a device with a screen is able to display words and pictures. I also want to learn programming because it deals a lot with electronics. Programming shows how we communicate and tell devices what to do. Without programming, devices wouldn’t do…

Diffuse Optical Tomography is non invasive, non ionizing functional imaging modality used for detection of brain tumor and breast cancer. A forward model design depicts the placement of laser source and photo-detector around the tissue boundary. The light propagation on the phantom takes place in Near-Infra-Red wavelength. The incident light on the tissue boundary was absorbed and scattered. The scattered rays are detected by the photo-detector and scattered voltage of the tissue was measured.…

CHAPTER1 INTRODUCTION TO ZVT 1.1 What is ZVT? Zero voltage switching can best be defined as conventional square wave power conversion during the switch’s on-time with “resonant” switching transitions. For the most part, it can be considered as square wave power utilizing a constant off-time control which varies the conversion frequency, or on-time to maintain regulation of the output voltage. For a given unit of time, this method is similar to fixed frequency conversion which uses an adjustable…

to build a battery and light up a LED? Hypothesis If I use an electrolyte like a potato juice and two electrodes like galvanized steel and coper, then I should be able to create a small amount of electricity enough to light a LED (light emitting diode). Research Potatoes in general do not generate and do not store electricity. What potatoes do have that can help transfer energy is its soluble chemical property which may cause a chemical reaction between specific materials and then work as…

prompted the people and governments to seek new and innovative way to minimize the consumption and maximize the utilization of the available energy. In line with this understanding came the invention of the light emitting diodes technology. Originally the light emitting diodes denoted as "LED" produced low light concentrations and were commonly used as indicators in electrical circuits and electrical appliances. This has however changed once they were discovered that they could produce more…

Gallium is one of those elements that is used in industry every day. Gallium was discovered in Paris at the private laboratory of Paul-Emile Lecoq de Boisbaudran (1831-1912) at 3 a.m. on August, 1875. He observed a new violet line in the atomic spectrum of some zinc he had extracted from a sample of zinc blende ore (ZnS) from the Pyrenees. He knew it meant that an unknown element was present. Gallium comes from Gallia, the Latin name for France. Gallium also has origins in the Latin word Gallus.…

Introduction Aspergillus is a saprophytic ubiquitous fungi genus, which includes more than 200 species. This genus have positive and negative impact to human being. Some species of Aspergillus have pharmaceutical applications, but at same time, this genus could be pathogen of respiratory diseases, and also it could synthesys potent carcinogens. The most pathogenic specie of Aspergillus for human is A. fumigatus, which causes a wide range of sickness, depending to the immunological system of…

1 Introduction Interferometry is a measurement technique which utilizes the interference of waves in a medium to cre-ate interference patterns [5]. In general, the waves can be light, sound or radio waves. The interference pattern is detected by a photodetector and it provides some useful information about the properties of the object or phenomenon under test. Interferometers are used to make very small measurements that cannot be achieved with any other method. An important…

History of Communication The communication methods employed by human dates back from a very early stages of civilization. In the primitive ages, communication were based on human voice. But it had a limitation, the distance. As distance grew between two people, messages got hard to convey due to the limitation of vocal cord. Next big step taken by human civilization was the invention of fire. He soon realized that this fire could be used for communication. During the attack in China, soldiers…

The Hindu religion is greatly involved with animals. Animals represent many of the Hindu gods and goddess’s animals represent diodes and many animals are considered holy or sacred in the Hindu religion. Because such a large portion of the Country’s population is Hindu many of their laws overlap greatly with the beliefs derived from the Hindu religion. However these views and assumptions…