light emitting diode padlet by philip thomas https://padlet.com/philipthomas662003/o4js0526g6t4ca89 Made with charisma en-us 2021-01-03 07:57:57 UTC 2025-12-03 12:17:09 UTC hello@padlet.com ADVANTAGES philipthomas662003 https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049565383 1. Very low voltage and current are enough to drive the LED.
2. The response time is very less – only about 10 nanoseconds.
3. The device does not need any heating and warm up time.
4. Miniature in size and hence lightweight.
5. Have a rugged construction and hence can withstand shock and vibrations.
6. An LED has a lifespan of more than 20 years. 

]]> 2021-01-03 07:59:56 UTC https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049565383 WHY IS THE LED FORWARD BIASED? reubenalex2004 https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049569089 The LED is forward biased so as to enable the movement of majority carriers i.e. electrons from the n side to the p side, and holes from p side to n side. Under the forward bias, the concentration of minority carriers increases on either side of junction boundary. For example, under the forward bias the concentration of electrons(minority carriers on p side)increases. These free electrons in the conduction band combine with the holes in the valence band and this leads to the emission of energy, due to the specific compounds that these diodes are made of, they emit energy in the form of light.Under a reverse bias, movement of majority carriers across junction wouldnt take place therefore recombination will not take place. This would also result in the damage of the LED since it has very low values of breakdown voltage.]]> 2021-01-03 08:03:26 UTC https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049569089 APPLICATIONS rhn2203 https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049571066 . used in remote control systems
.used in optical communications system 

]]> 2021-01-03 08:05:16 UTC https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049571066 Disadvantages ammarahmed533 https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049577463 Overheating is common and this can reduce lamp life.
2. High up front costs of LED installation.

]]> 2021-01-03 08:10:46 UTC https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049577463 philipthomas662003 https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049580768 2021-01-03 08:13:47 UTC https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049580768 Introduction https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049582568 A light emitting diode (LED) is a forward biased PN junction diode, which emits visible light when energized.]]> 2021-01-03 08:15:32 UTC https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049582568 Working https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049589978 Under forward bias, electrons go from n region to p region. Holes go from p region to n region. Concentration of minority charges at junction boundary increases. Excess minority carriers at junction boundary recombine with majority carriers that are present near junction, resulting in release of energy in form of photons. ]]> 2021-01-03 08:22:34 UTC https://padlet.com/philipthomas662003/o4js0526g6t4ca89/wish/1049589978