• PDF Download Library, you can download datasheet, ebooks, application notes, or other pdf documents.
  • Circuit Diagram, a comprehensive explanation about electronic circuit diagram, electrical diagram, or electronic schematic.
  • EDN Magazine, electronic engineering journal, contain many electronic engineering related articles. Design Idea is one of my favorite column.
  • All About Circuits , free electronic tutorials, also contain electronic discussion forum. You can discuss your electronics problem in the forum and get the solution from other member.
  • Electronic Design, electronic design magazine, a lot of technical articles and latest technology news.
  • Electroniq.net, dedicated to all electronic hobbyist, you can find  many electronic schematics ,  electronic related software downloads, tutorials, and many more .