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Batt ery Monitor Mkl Mkil Police Lits 1,2,3
Bi-Coloured LED POlIVerin g A Project
Bike TurningSienal Railroad Liehts (tlas in;)
Bi-Polar LED Driver RGB LED Driver
Qis! RGB ED Flasher
Domino Effect - The Resist or Colour Codes
Driving A Bi-Coloured LED Roulette
Driving White EDs Shake LED Torch
Fading LED Solar Garden ight
Flashing A LED Solar Tracker
Flashing Railroad Lights The Domino Effect
Kitt Scan ner Traffic Liiill
Kni t Rider Traffic Lij1ts - 4 way
LED Chaser TurningSiif!al
LED Detects Lit U IDoV\lll Fad in LED
LED Dice Up/DoV\lll Fad ing LED - 2
LED Dimmer White LED on Supply
LED FX White LED Flasher
LED Night Light 2 White LEDs on Supply
LEDs on 120v and 240v 3x3x3 Cube
LED Zeppelin 4 way Traffic Lights
Lights - Traffic Lights 8 Million Gain!
Low Fuel Indicator 10 LED Chaser
Mains Night Light 120v and 240v LEDs
INTRODUCTION
This e-book covers the Light Emitting Diode.
The LED (Light Emitting Diode) is the modern-day equivalent to the light-globe.
It has changed from a dimly-glowing indicator to one that is too-bright to look at.
However it is entirely different to a "globe."
A globe is an electrical device consisting of a glowing wire while a LED is an electronic device.
A LED is more efficient, produces less heat and must be "driven" correctly to prevent it being
damaged.
This eBook shows you how to connect a LED to a circuit plus a number of projects using LEDs.
It's simple to use a LED - once you know how.
CONNECTING A LED
A LED must be connected around the correct way in a circuit and it must have a resistor to limit the
current.
The LED in the first diagram does not illuminate because a red LED requires and the cell only
supplies . The LED in the second diagram is damaged because it requires and the two cells
supply 3v. A resistor is needed to limit the current to about 25mA and also the voltage to , as
shown i