Light-emitting diode, Other Engineering

Assignment Help:

Light-emitting diode:

One of the most common light sources used in electronics is the "Light Emitting Diode" (LED).  A LED is a two terminal semiconductor device comprising a p-n junction, which conducts in one direction only.  This semiconductor material emits light when the p-n junction is forward biased and a current is flowing through it.  LEDs can be manufactured to emit visible or invisible (infra-red) light.

Visible LEDs are often used as indicators in electronic equipment either singly, for indicating 'power on' for instance, or in arrays for alpha/numeric displays.

LEDs are reliable and have a very long life if treated carefully.  Light emission in different colours of the spectrum can, when required, be obtained by varying the proportions of the elements comprising the chip, and also by a technique of "doping" with other elements, i.e. nitrogen.  Current consumption (typically about 5 - 20 mA) generally limits the usefulness of a LED to equipment that is not battery powered.

2032_light emmiting diode.png


Related Discussions:- Light-emitting diode

Engineering Risk and Reliability , The demand placed on a system is describ...

The demand placed on a system is described by a lognormally distributed random variable with mean 50 and standard deviation of 10. The capacity of the system is modeled by a Weibul

Case study, dhpl is the firm situated in faridabad,its ending year on 31st ...

dhpl is the firm situated in faridabad,its ending year on 31st march 2009 ,1000million asset base rs.650 million & the net profit of the company was 76 milloin the managmnt of the

Accurate design of heat transfer systems, Hollow cylinders are useful build...

Hollow cylinders are useful building structures commonly used for both industrial and domestic purposes. Tanks, cars and some transport machineries are all applications of inner-in

Spot welding, In spot welding, the parts to be joined are normally over lap...

In spot welding, the parts to be joined are normally over lapped. The work piece are clamped between two water cooled copper electrodes. On the passage of a high transient current,

Hydro plant, various components used in plants

various components used in plants

Risk Decomposition, Analyze two stocks from an industry of your choice in t...

Analyze two stocks from an industry of your choice in terms of risk decomposition, specifically portfolio variance eq. You should pick 2 firms that you have a certain degree of fam

Regarding my project, i want to do project in the area wing in aircraft...p...

i want to do project in the area wing in aircraft...please give some sugestions or ideas in that

Industrial buildings inspections-fire protection engineering, Industrial Bu...

Industrial Buildings Inspections: Fire safety within industrial buildings falls largely within the scope of more general precautions and recommendations given in Chapter of NF

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd