Will an L293D work as a motor shield on an Arduino mega? http://m.ebay.com/itm/L293D-Motor-Drive-Shield-Expansion-Board-For-Arduino-Duemilanove-Mega-UNO-/322316794436?hash=item4b0b93fa44:g:yLAAAOSw5cNYHA6u&_trkparms=pageci%3A72a6b116-dc50-11e6-be3d-005056aa4076%7Cparentrq%3Aa9f13b811590a2a203326dc6ffbd6ed3%7Ciid%3A4