I know that Ben used one in the CNC SNESp that he made so I looked on the book webpage and it says this:
"Click the links below to be taken immediately to current listings displaying parts for purchase or bidding. (Courtesy of eBay!) (Searches are automatically set to retrieve the correct model/type of part required for this particular project and will open in a new window - so you won't get lost
But the digi-key andd radio shack links just go to the site and not a page of parts, maybe he tells how to make it in the book.
