https://www.youtube.com/watch?v=ifd73nx1iHw

remote-car-driver.js

var Leap = require("leapjs");
var five = require("../lib/johnny-five.js");
var board = new five.Board();
var scale = five.Fn.scale;
var max = 0;
var min = 0;

function toDegrees(value) {
  var degrees = value > 0 ?
    scale(value, max, min, 0, 90) :
    scale(value, max, min, 90, 180);
  return degrees | 0;
}

board.on("ready", function() {
  var steering = new five.Servo(6);
  var distance = new IR.Distance({
    device: "GP2Y0A02YK0F",
    pin: "A0"
  });

  Leap.loop(function(frame) {
    frame.hands.forEach(function(hand, index) {
      var roll = hand.roll();

      max = Math.max(max, roll);
      min = Math.min(min, roll);

      steering.to(toDegrees(roll));
    });
  });

  distance.on("change", function() {

    // collision detection here!!

  });
});