While helping a friend out with the problem that he bought a S-Video to Scart cable and not a Scart to S-Video cable I came across a new site that I thought I'd better tell you all about. Its Pinouts.RU there in a link to the site on the button below
For many years I've used the Hardware Book http://www.hardwarebook.info/ i remember when it was a standalone app, both have a wealth of infomation and great for getting you out of trouble.