I got many requests from you to upload old content to this website because many dead links are lying out there (e.g., here and here). The old content is gone because my old server crashed, and it didn’t want to start. After a couple of years, though, the hard drive worked for 30 minutes. That was enough to restore my content.
I will put back here the projects I had done and try to create some schematics too. I will create a proper HTTP 301 redirect from the old URLs to the new URLs as well.