HEATKEYS

Information and supplies for science fair projects regarding physics, computers, electronics and robotics. featuring: electronics, robotics, speech recognition, geiger counters, ecoSpheres, nitinol, sma, pic, microcontrollers, picbasic, picbasic pro...

A reference collection of general knowledge fact sheets - one-page summaries of common subjects - biology, computer, economics, food, geography, google, internet, medicine, politics, religion, science, etc.

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

MAKE brings the do-it-yourself mindset to all the technology in your life. MAKE is loaded with exciting projects that help you make the most of your technology at home and away from home. This is a magazine that celebrates your right to tweak, hack, ...

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

Electronic Engineering Times is the industry resource for news, analysis, design ideas & solutions, products, education, & engaging with the EE community.

Electronics Projects, Schematics

CircuitsArchive: Main Page. Public Archive of Electronic Circuits for the hobbyist.