《adafruit-arduino-lesson-3-rgb-leds》.pdf

Arduino Lesson 3. RGB LEDs Created by Simon Monk Last updated on 2013-06-11 09:30:20 PM ED Guide Contents Guide Contents 2 Overview 3 Parts 4 Part 4 Qty 4 Breadboard Layout 6 Colors 8 Arduino Sketch 9 Using Internet Colors 12 heory (PWM) 13 Other hings to Do 14 © Adafruit Industries http:// learn.adafruit .com/adafruit-arduino-lesson-3-rgb-leds Page 2 of 14 Overview In this lesson, you will learn how to use a RGB (Red Green Blue) LED with an A rduino. You will use the analogWrite function of A rduino to control the color of the LED. At first glance, RGB (Red, Green, Blue) LEDs loo j ust li e regular LEDs, however, inside the usual LED pac age, there are actually three LEDs, one red, one green and yes, one blue. By controlling the brightness of each of the individual LEDs you can mix pretty much any color you want. We mix colors j ust li e you would mix audio with a mixing board or paint on a palette - by adj usting the brightness of each of the three LEDs . T he hard way to do this would be to use different value resistors (or variable resistors) as we played with in lesson 2. T hats a lot of