led-pulse-animation.md

LED - Pulse with animation

LED pulse example that incrementally fades an LED brighter and brighter. Requires LED on pin that supports PWM (usually denoted by ~).

LED on pin 11 (Arduino UNO)

LED inserted directly into pin 11.

Fritzing diagram: docs/breadboard/led-11-pwm.fzz

 

Run this example from the command line with:

node eg/led-pulse-animation.js

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

board.on("ready", () => {
  // Create a standard `led` component
  // on a valid pwm pin
  const led = new Led(11);

  // Instead of passing a time and rate, you can
  // pass any valid Animation() segment opts object
  // https://github.com/rwaldron/johnny-five/wiki/Animation#segment-properties
  led.pulse({
    easing: "linear",
    duration: 3000,
    cuePoints: [0, 0.2, 0.4, 0.6, 0.8, 1],
    keyFrames: [0, 10, 0, 50, 0, 255],
    onstop() {
      console.log("Animation stopped");
    }
  });

  // Stop and turn off the led pulse loop after
  // 12 seconds (shown in ms)
  board.wait(12000, () => {

    // stop() terminates the interval
    // off() shuts the led off
    led.stop().off();
  });
});

 

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.