http://www.ladyada.net/learn/arduino/ http://www.coolcomponents.co.uk/catalog/product_info.php?products_id=240&osCsid=27db600349f4513ebc37e13ea8b9ce69 http://www.adafruit.com/index.php?currency=AUD&main_page=product_info&cPath=17&products_id=68