Jeff Hoefs soundanalogous

Building an ultrasonic sensor backpack

Note: This is a bit of a scratch to see what's involved in getting the ping sensor to work as an I2C backpack.

Acknowledgements

Jeff Hoeffs [http://github.com/soundanalogous](Sound Analogous) for guidance on using interrupts to do the time measurement on the ATTINY and [https://gist.github.com/soundanalogous/e94c6ebbc457b98b8383](providing a good example to work from)
[http://github.com/rwaldron](Rick Waldron) for support of the backpack idea and keeping me moving. ;)

Dependencies.

UMD-Inspired JS Module Boilerplate

This is the module format you don't know you need until you need it. Write your module once and have it work in a CJS/NodeJs, AMD, YUI (v3+), or Browser Global environment.

Best Used When...

You are migrating from namespaced (err, globals) code to either AMD or CJS modules or both.
You can't yet factor out browser globals but also need to test your code via NodeJS (e.g. Mocha).

	/**
	* animator factory for creating requestAnimationFrame callbacks
	* and simplifying their cancellation. Includes Erik Moller polyfill
	* @author Kyle Phillips
	* @example
	* animator(function(){
	* //do this every time
	* if(Math.random() > 0.9){
	* this.complete();
	* }

	// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
	// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

	// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel

	// MIT license

	(function() {
	var lastTime = 0;
	var vendors = ['ms', 'moz', 'webkit', 'o'];

	#!/usr/bin/env node

	// Example of how to fallback to alternative websocket library for old protocol clients
	// see https://gist.github.com/1148686

	var http = require('http'),
	WebSocketRequest = require('websocket').request,
	ws = require('websocket-server');