johnny-five/eg/microphone.js

The JavaScript Robotics and Hardware Programming Framework. Use with: Arduino (all models), Electric Imp, Beagle Bone, Intel Galileo & Edison, Linino One, Pinoccio, pcDuino3, Raspberry Pi, Particle/Spark Core & Photon, Tessel 2, TI Launchpad and more!

var five = require("../lib/johnny-five");
var board = new five.Board();

board.on("ready", function() {
  var mic = new five.Sensor("A0");
  var led = new five.Led(11);

  mic.on("data", function() {
    led.brightness(this.value >> 2);
  });
});