led-rgb-intensity.md

LED - RGB Intensity

Demonstrates changing intensity of an RGB LED. Requires RGB LED on pins that support PWM (usually denoted by ~).

RGB LED. (Arduino UNO)

RGB LED connected to pins 6, 5, and 3 for red, green, and blue respectively.

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

 

Run this example from the command line with:

node eg/led-rgb-intensity.js

const temporal = require("temporal");
const { Board, Led } = require("johnny-five");
const board = new Board();

board.on("ready", () => {
  // Initialize the RGB LED
  const led = new Led.RGB([6, 5, 3]);

  // Set to full intensity red
  console.log("100% red");
  led.color("#FF0000");

  temporal.queue([{
    // After 3 seconds, dim to 30% intensity
    wait: 3000,
    task() {
      console.log("30% red");
      led.intensity(30);
    }
  }, {
    // 3 secs then turn blue, still 30% intensity
    wait: 3000,
    task() {
      console.log("30% blue");
      led.color("#0000FF");
    }
  }, {
    // Another 3 seconds, go full intensity blue
    wait: 3000,
    task() {
      console.log("100% blue");
      led.intensity(100);
    }
  }]);
});

 

License

Copyright (c) 2012-2014 Rick Waldron waldron.rick@gmail.com Licensed under the MIT license. Copyright (c) 2015-2023 The Johnny-Five Contributors Licensed under the MIT license.