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light - Electromagnetic radiation in a band of frequencies that can be received by the human eye.
light-emitting diode - A semiconductor diode that converts electric energy into electromagnetic radiation at a visible and near infrared frequencies when its pn junction is forward biased.

Drawing Circuits
Drawing Circuits When designing circuits it is not practical to draw physical likenesses of the components you wish to use. In place of each component a symbol is use to represent it. For example:


Electricity
Electricity Electricity is all around us from the small amounts of a spark between your finger and the car, to your phone and tv, to the huge amounts in lightning. A fun way to see the effec

Types
Types of Diodes Small Signal Diode - Low voltage/current diodes. Power Rectifier - High voltage/current diode. Bridge rectifiers are are four diodes pre-installed into one component, useful for

Types
Resistor Types Metal Film - Work from a thin film of metal or particles of metal are used to achieve different resistances. Carbon Film - A thin film of carbon is laid upon a rod of cer

Signals
Signals Once your circuits get more complex they will wan to communicate to other devices or to store information or to manipulate information. In electronics this is done with waves, pulses and sign