Interactive Electronic Circuits Analysis
- Interactive electronic and electrical circuit analysis and tutorial site.
- http://www.analyzethat.net/index.php

Electronics Projects with Circuit Diagrams
- A collection of electronics projects and circuit diagrams. How to build your own electronic gadgets.
- http://www.diy-electronic-projects.com/

Rugby PIC Clock
- Schematic a construction of a 60kHz time code receiver and clock. Includes PIC programmer and LED clock display.
- http://www.burningimage.net/clock/

Electronics Circuit Search Engine
- A search engine for electronics circuits.
- http://circuitscout.com/

Ronald´s Electronic Project Site
- A site with fully documented electronic projects such as stand alone microcontroller circuits and nixie, numitron and decatron clocks
- http://members.chello.nl/r.dekker49/

Circuits Archive
- ASCII circuit diagrams, radio, audio and computer realted circuits; data sheets.
- http://www.ee.washington.edu/circuit_archive/

Building Gadgets
- A collection of electronics projects, circuits, datasheets, and helpful articles from the authors of "Electronics Projects For Dummies".
- http://buildinggadgets.com/

Electro Tech Electronic Projects
- An electronic forum. Includes a collection of small electronic circuits.
- http://www.electro-tech-online.com/

Electronic Info and Schematic Page
- Technical references and schematics archive: alarm, audio, auto, etc.
- http://www.schematicsforfree.com/

Electronic Circuits for the Hobbyist
- Electronics projects, schematics, and tutorials: high voltage, radio control, timers, oscillators, RF transmitters, amplifiers and other.
- http://www.uoguelph.ca/~antoon/

CXI Schematics
- Schematic index: audio, RF, power, switching and miscellaneous circuits.
- http://www.zen22142.zen.co.uk/schematics.htm

Electronic Circuit Diagrams
- Electronic projects with schematics: audio, phone, auto and other circuits.
- http://www.projectecd.com/

CircuitDB
- A searchable database of schematics and electronic circuit designs such as alarms, audio/video, auto, etc.
- http://www.circuitdb.com/

Free Electronics Schematics Diagrams
- Electronics diagrams: pro music equipment, vintage tube amplifiers and other; chat room.
- http://www.schematics.ca

Electronic Circuits Directory
- A collection of electronic schematics and projects, index of tutorials and design software.
- http://www.next.gr/

Best-Circuits
- Electronic circuits and schematic diagrams: power supplies, audio, digital, converters and inverters, amplifiers; learning materials.
- http://www.best-circuits.com/

KM's Site
- Home made electronic circuits, software tools, Java scripts, facts and figures for use in electronics engineering.
- http://home.scarlet.be/km/

GE Power Management
- The art and science of protective relaying. A complete online textbook.
- http://www.geindustrial.com/pm/notes/artsci/

Publications
- Some publications from Avtech, subjects range from VCR monostables to HV stepped recovery diodes.
- http://www.avtechpulse.com/papers/

Tomi Engdahl's Electronics Pages
- Electronic circuits and projects designed by Tomi Engdahl. Audio, video, computer, data communication, light effects and controllers, power supplies, and telephone circuits.
- http://www.epanorama.net/circuits/

Electronics Circuit Forum
- Electronic circuits and projects with description, diagrams and PCB, electronics articles.
- http://www.electronics-circuits.net/

40W No Tune FM Broadcast
- Power Amplifier Design.
- http://www.irational.org/sic/radio/40w-no-tune-amp.html

Electronic Design- Ideas for Design
- A circuit archive from Electronic Design magazine.
- http://www.elecdesign.com/Departments/DepartmentID/2/2.html

Delabs Electronic Schematic Diagrams
- Electronic circuit archive, FAQ, freeware, resources directory.
- http://www.delabs-circuits.com/

Butterworth Low-Pass Filter
- Design of a 5th order Butterworth LP filter using Sallen-Key circuit design.
- http://www.ece.uic.edu/~jmorisak/blpf.html

Sam's Schematic Collection
- Includes information about safety, power supplies, Jacobs Ladders, circuits, IR detectors, power oscillators, and schematics.
- http://repairfaq.ece.drexel.edu/sam/samschem.htm

EDN Archives
- Online magazine articles consist of information about circuits, software programs, listings and helpful tips.
- http://www.edn.com/archive

Electronics Infoline
- Search engine and categorically organized circuits in a directory.
- http://www.electronicsinfoline.com/

The Electronic Peasant
- Dedicated to inexpensive Do-It-Yourself music electronics, electronic salvage/recycling, and alternative energy projects.
- http://www.electronicpeasant.com/

Electronics Lab
- Electronic circuits with full description, diagrams and PCB, electronics articles, links and downloads.
- http://electronics-lab.com/

Computer Circuits 200 A
- A web-based course on designing and troubleshooting digital systems, primarily microcomputer based. Covers basic digital logic circuits.
- http://learnat.sait.ab.ca/ict/cmph200/

Julien Thomas Enterprises
- RS-232 protection and connections schemes. For protecting your Mother Board.
- http://www.kielnet.net/home/julien.thomas/

Electronics and Electrical Engineering Resource
- Electronics theory, books, construction projects, tips, and practical advice.
- http://www.electronics-ee.com

Hobby Circuits
- A large collection of simple electronic circuits for hobbyists from Imagineering On-line Magazine.
- http://www.imagineeringezine.com/e-zine/hcircuits.html

Hobby Electronics
- From Japan. Several interesting circuits. Some interesting theory and applications.
- http://hobby_elec.piclist.com/

Music Electronics µArchive
- An archive of tube and transistor amplifiers and information, mostly for music applications.
- http://audible.transient.net/archive/

Home Brew Spectrum Analyzer
- How to make a spectrum analyzer with tips and advice on componenet selection and architecture. A large number of circuit ideas and schematics, with sources and construction tips.
- http://www.nitehawk.com/rasmit/sa50.html

Circuit Cellar Archive
- Nearly every issue is listed from 1988 to 2001, software code.
- ftp://ftp.circellar.com/pub/Circuit_Cellar/

Closed Caption Decoder
- A simple closed caption decoder for your TV. Schematic, BOM, theory of operation.
- http://www.brouhaha.com/~eric/pic/caption.html

WeMan's Electro Stuff
- Audio tubes, transistors, analog circuits, transistor amplifiers as well as connector pinouts.
- http://margo.student.utwente.nl/el/

Electronics Zone
- Electronic circuits, kits, do-it-yourself, circuit diagrams, design and electronics hobby schematics from alarms to test circuits.
- http://www.electronic-circuits-diagrams.com/

Wenzel Associates Technical Library
- Time, oscillation and frequency circuits, articles, and tutorials.
- http://www.wenzel.com/documents/library.html

Electronics Circuit Analysis Puzzles
- Puzzles to master electronic circuit analysis; an electronics tutorial.
- http://www.twysted-pair.ca/

Sam Electronic Circuits
- Electronic Circuits for the hobbyist, analog, audio and digital, useful circuits with full Greek descriptions , diagrams in Greek and English.
- http://users.otenet.gr/~athsam

Synthesizer Home Page
- How to make a very nice and stable frequency synthesizer from Harvard. Includes schematics, block diagrams and parts lists. Very through design.
- http://seti.harvard.edu/synth/index.html

Discover Circuits
- A collections of categorized and cross-referenced electronic circuits or schematics.
- http://discovercircuits.com/

Techlib.com Electronics
- Audio, PC, games, phone, oscillator, power, test equipment, and weather related schematics and information.
- http://www.techlib.com/electronics/index.html

Electronic Circuits
- An archive of electronic circuits divided into categories such as power supplies, auto, computer circuits, sound/radio.
- http://www.aaroncake.net/circuits/index.asp

FC's Electronic Circuits
- Circuits on solar power, micro power FM broadcasting, a temperature controlled NICD charger, and more from Forrest Cook; electronics links.
- http://www.solorb.com/elect/

Electronics Hobbyist
- Projects for beginners, articles on electronics and electrical science, Tesla coils, electrostatic devices, and resource links for the hobbyist and educator.
- http://www.eskimo.com/~billb/amateur/elehob.html