The Hardware Book is “The Internet’s largest free collection of connector pinouts and cable descriptions.”  If you have trouble remembering how to splice an S-Video into a composite wire, or how to build a Serial to PS/2 mouse adapter, then you will spend hours on this site.
“The Hardware book is the internet’s largest free collection of connector pinouts and cable descriptions. All pages have the same style of presentation. This makes it easier to find information..”

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