LEDs

light it up

Light Emitting Diode

what the heck is a diode

Lets start with Semiconductors 

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Semiconductors

Depending on conditions, a semiconductor can act like

a conductor or an insulator.

Silicon is the most popular semiconducting material.

Semiconductors

Pure silicon isn't very useful.

But add some other chemicals,

and the material can tend to have

extra electrons (negative or n-type silicon)

OR

missing electrons (positive or p-type silicon)

Text

A diode is a two-terminal electronic component that conducts primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance to the current in one direction, and high (ideally infinite) resistance in the other.

A diode is a two-terminal electronic component that conducts primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance to the current in one direction, and high (ideally infinite) resistance in the other.

🤔 That must be why

LEDs must be connected

with long leg to + and short to -

or they won't light up

A light-emitting diode (LED) is a

two-lead semiconductor light source.

It is a p–n junction diode

that emits light when activated.

A light-emitting diode (LED) is a

two-lead semiconductor light source.

It is a p–n junction diode

that emits light when activated.

😬 What is a two-lead semiconductor?

😬 What is a p-n junction diode?

A light-emitting diode (LED) is a

two-lead semiconductor light source.

It is a p–n junction diode

that emits light when activated.

A semiconductor diode, the most common type of diode today, is a crystalline piece of semiconductor material with a p–n junction connected to two electrical terminals

A light-emitting diode (LED) is a

two-lead semiconductor light source.

It is a p–n junction diode

that emits light when activated.

Ok, so semiconductors are

crystals 🔮 (crystalline material)

that have an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass.

A light-emitting diode (LED) is a

two-lead semiconductor light source.

It is a p–n junction diode

that emits light when activated.

And a p-n junction?

A light-emitting diode (LED) is a

two-lead semiconductor light source.

It is a p–n junction diode

that emits light when activated.

A p–n junction is a boundary or interface between two types of semiconductor material, p-type and n-type, inside a single crystal of semiconductor. The "p" (positive) side contains an excess of holes, while the "n" (negative) side contains an excess of electrons.

A light-emitting diode (LED) is a

two-lead semiconductor light source.

It is a p–n junction diode

that emits light when activated.

 The p-n junction is created by the intentional introduction of impurities into an plain semiconductor for the purpose of modulating its electrical properties.

A light-emitting diode (LED) is a

two-lead semiconductor light source.

It is a p–n junction diode

that emits light when activated.

uhhhh... this sounds like freaking magic.

You have these crystals, and using alchemy you create different crystals inside the crystal that sing in different ways when energy is applied to them.

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