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Free Lecture Notes, Syllabus, Tutorials, Audio and Video from MIT professors. All Free. No registration. | MIT OpenCourseWare | ocw.mit.edu

Hobby Projects, a resource for Hobbyist, Engineers, Students, R&D Persons & Consultants, Electronic Projects, Electronic Tutorials, Microcontroller Based Projects, Microprocessor Tutorials, Schematics, Dictionary of Electronics Terms, Abbrevi...

Electronic Ciruits portal of free electronic circuits, schematics, designs, or diagrams & other resources for engineers, inventors & students.

PCB Heaven! Electronic theory, schematic circuits and PIC tutorials

Learn the practical steps involved in how to build electronic circuits. Learn to solder and make professional circuit boards on the cheap.

PyroElectro.com brings you cool projects that you can build at home, improve upon or just drool over. Each project has a full write up with all details.

Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 150 billion archived web pages.

Instructables is the Biggest How To and DIY community where people make and share inspiring, entertaining, and useful projects, recipes, and hacks.

Home Page - Worldwide supplier of process automation services and technologies, including PlantWeb digital plant architecture.

Electronic circuits projects and diagrams