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LED - Rainbow

Demonstrates use of an RGB LED (common cathode) by cycling through rainbow colors. Requires RGB LED on pins that support PWM (usually denoted by ~).

Common Cathode RGB LED. (Arduino UNO)

Basic example with RGB LED connected to pins 6, 5, and 3 for red, green, and blue respectively. The common pin is connected to ground.

docs/breadboard/led-rgb.png

Fritzing diagram: docs/breadboard/led-rgb.fzz

 

Run with:

node eg/led-rainbow.js
var five = require("johnny-five");
var board = new five.Board();

board.on("ready", function() {
  var rgb = new five.Led.RGB([6, 5, 3]);
  var rainbow = ["FF0000", "FF7F00", "00FF00", "FFFF00", "0000FF", "4B0082", "8F00FF"];
  var index = 0;

  setInterval(function() {
    if (index + 1 === rainbow.length) {
      index = 0;
    }
    rgb.color(rainbow[index++]);
  }, 500);
});

 

License

Copyright (c) 2012, 2013, 2014 Rick Waldron waldron.rick@gmail.com Licensed under the MIT license. Copyright (c) 2014, 2015 The Johnny-Five Contributors Licensed under the MIT license.

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