Animates a strip of Neopixels according to how loud an environment is.

sound-meter.js

var tessel = require('tessel');
var ambientLib = require('ambient-attx4');
var animations = require('neopixel-animations');
var Neopixels = require('neopixels');
var neopixels = new Neopixels();
var ambient = ambientLib.use(tessel.port.A);
var numLEDs = 60;

var helpFactor = 10;

ambient.on('ready', function() {
  ambient.on('sound', function(levels) {
    var level = levels[0] * helpFactor;
    neopixels.animate(numLEDs, animations.progressBar(numLEDs, 'blue', level));
  });
});