Controls the brightness of an LED by pairing it with a slider. Requires LED on pin that supports PWM (usually denoted by ~).

Breadboard for "LED - Slider"


Fritzing diagram: led-slider.fzz


Run this example from the command line with:

node eg/led-slider.js
const {Board, Led, Sensor} = require("johnny-five");
const board = new Board();

board.on("ready", () => {
  const slider = new Sensor("A0");
  const led = new Led(11);

  // Scale the sensor's value to the LED's brightness range
  slider.on("data", () => {
    led.brightness(slider.scaleTo([0, 255]));


Component Classes in this example:

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