allaboutcircuits.com
Unknown
All About Circuits is an electronics education site offering tutorials, reference articles, and practical projects on circuit theory and design. It also hosts a comprehensive component library and an active forum for help and discussions.
More resources on Introduction to ECE
Introduction to Electronics
This course introduces students to the basic components of electronics: diodes, transistors, and op amps. It covers the basic operation and some common applications.
EEVblog Forums
Beginners board of the EEVblog electronics forum, where hobbyists and practicing engineers answer questions on circuit design, component selection, test equipment and troubleshooting. Searching past threads shows how experienced designers diagnose real problems with power supplies, measurements and first projects.
Khan Academy Electrical Engineering
Interactive free lessons on circuits, ideal for beginners; mentioned in practitioner threads
Circuits and Electronics (MIT 6.002)
The lumped circuit abstraction: resistive networks, dependent and independent sources, MOS transistors, the digital abstraction, amplifiers, energy storage elements, and first- and second-order dynamics in time and frequency domains. Includes 26 lecture videos, notes, problem sets and exams for analyzing and designing circuits.
Practical Electronics for Inventors
Reference-style guide to practical circuit building, covering passive components, semiconductors, op amps, digital logic, power supplies and sensors, with formulas kept to what is needed. Readers learn to select components and design working circuits for their own gadgets.
Make: Electronics
Hands-on primer built around a sequence of experiments with real components: batteries, resistors, capacitors, transistors, relays and logic chips. Readers learn electronics by building and deliberately breaking circuits, ending able to read schematics and design simple digital projects.