HEATKEYS

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

This multimedia site contains tutorials, free software for circuit designs including PLL, filters, directional couplers, and electronic circuit schematics.

David DiGiacomo

Electronics and software for hobbyists, people with a professional interest or a passion for making things work

Princeton University is a vibrant community of scholarship and learning that stands in the nation's service and in the service of all nations.

Electrical Engineering Community for hardware designers with design tools, projects, articles, jobs, events, discussions, and social networking.

Electronics service manual exchange : schematics,datasheets,diagrams,repairs,schema,service manuals,eeprom bins,pcb as well as service mode entry, make to model and chassis correspondence and more.

Open Electronics is the brainchild of Futura Elettronica. We will support you in designing circuits, writing firmware, making prototypes, so as to help you project your idea.

element14.com is a design engineer community for sharing electronic engineering solutions. Find resources for technical components, specifications and expert advice.

Texas Instruments (TI) is a global analog and digital semiconductor IC design and manufacturing company.