Tag Archives: Diodes

What are Zener, Schottky and Avalanche Diodes?

Diodes are very commonly used semiconductor devices. They are mostly used as rectifiers for converting Alternating to Direct current. Their special characteristic of allowing current flow in only one direction makes them indispensable as rectifiers. Apart from rectification, various types of diodes are available for different purposes such as for generating light, microwaves, infrared rays and for various types of switching at high speeds. For example, the power supply industry has been moving Read more [...]

How did the diode get it’s name?

Although most diodes are made of silicon nowadays, it was not always so. Initially, there were two types – thermionic or vacuum tube and solid state or semiconductor. Both the types were developed simultaneously, but separately, in the early 1900s. Early semiconductor diodes were not as capable as their vacuum tube counterparts, which were extensively used as radio receiver detectors. Various types of these thermionic valves were in use and had different functionalities such as double-diode triodes, Read more [...]

Schottky Diodes – What makes them so special?

Some of the most common questions we get are about Schottky diodes. The simple definition of a Schottky diode is a diode with a very fast switching action as well as a lower forward voltage drop. As the current flows through a diode, it experiences a slight voltage drop across the diode terminals. Normally, a diode has approximately 0.7-1.7V drops. A Schottky diode, however, will see a drop in voltage between 0.15-0.45V. The benefit of this lower drop? A much higher system efficiency. The Read more [...]

Opening Up and Tearing Down an IPOD Shuffle

Opening up and tearing down an IPOD Shuffle to see what's inside... The 3rd Generation of the IPOD Shuffle is a wonder of technology....1000 songs stored in an aluminum case smaller than a disposable lighter. Did you ever wonder what electronic components make up the guts of an IPOD Shuffle? You might be surprised at what goes into the circuitry of the IPOD Shuffle. In descending order by percentage of cost, the main components are: logic, memory, metals, rechargeable materials, connectors, Read more [...]

Types of Diodes

Diodes are an important part of today’s electronic components and are widely used for a number of applications. Accordingly, a large number of different types of diodes have been created to cater to their wide array of uses. The more popular types of diodes are described below. Schottky Diodes: These diodes are made from a semiconductor to metal contact instead of semiconductor-semiconductor junction. This gives them a lower forward drop voltage as compared to pn junction diodes. They have Read more [...]

Early Crystal Radios

Requiring no battery, the crystal radio was one of the earliest forms of radio having been developed in the late 1800s and early 1900s. At this time the crystal radio sets were used to receive Morse code messages, but as time progressed the voice messages could also be received by such sets. This progression had much to do with an improvement in materials, which included the diodes and tuning coil. Even with an improvement in materials though, the construction of a radio set was fairly simple to Read more [...]