- FC's Electronic Circuits - Forrest Cook.
- ePanorama - Tomi Engdahl, Projects.
- Discover Circuits - David's collection, Links.
- eServiceInfo.com - Service Manual. Repair.
- Strippenstrolch - Electrical and Electronics.
- 4QD-TEC - Many Discrete Semiconductor Designs. Generic Circuit Blocks, Circuits Concepts.
- Circuit Exchange International - Circuits to learn. design and build Gadgets, Simulate Circuits.
Educational Circuits and Design Resources
- Electronics Club - Construction of Projects, Soldering Guide, by John Hewes.
- Electronics 2000 - Calculators, resources, links, information, basics, learning.
- RepairFAQ-Sam - Repair and service tips, how-to and schematics, home electronics.
- Electronics Tutorials - Ian Purdie VK2TIP. Basic Electronics Theory and Practical Projects.
- Projects of Ronald - Simple Oscilloscope, Nixie Tube Projects, Clocks, Valve Tube circuit
- Schematics of delabs - delabs Industrial and instrumentation Schematics with Design notes.
- Freebyte Electronics - Listing of Free Electronics Circuits and project resources in the web.
- Play Hookey – Interactive Examples, Electronics Edutainment.\