http://www.phidgets.com/products.php?category=0 http://www.phidgets.com/products.php?category=0 Used these for some simple automation needs in the past. Simpl

http://www.phidgets.com/products.php?category=0 http://www.phidgets.com/products.php?category=0 Used these for some simple automation needs in the past. Simple .net library available on the site. Not nearly as cheap as the one in the post (which I did have to google 3 different sites to find the price of)