Electronics
- 342
- Bowden's Hobby Circuits
- A collection of electronic circuits for the hobbyist or student, links to related sites, commercial kits and projects, newsgroups and educational areas.
- 343
- Building Gadgets
- A collection of electronics projects, circuits, datasheets, and helpful articles from the authors of "Electronics Projects For Dummies".
- 344
- Butterworth Low-Pass Filter
- Design of a 5th order Butterworth LP filter using Sallen-Key circuit design.
- 346
- CircuitDB
- A searchable database of schematics and electronic circuit designs such as alarms, audio/video, auto, etc.
- 349
- Delabs Electronic Schematic Diagrams
- Electronic circuit archive, FAQ, freeware, resources directory.
- 350
- Discover Circuits
- A collections of categorized and cross-referenced electronic circuits or schematics.
- 351
- Electro Tech Electronic Projects
- An electronic forum. Includes a collection of small electronic circuits.
- 352
- Electronic Circuit Diagrams
- Schematics with descriptions and do-it-yourself electronic projects for hobbyists.
- 354
- Electronic Circuit Projects
- Electronics projects, schematics,PCB tips for high school students, teachers, students, and hobbyists.
- 355
- Electronic Circuit Schematics
- Free collection of electronic circuits diagrams, schematics and hobby projects. Includes amplifiers, battery chargers, power supplies and other.
- 356
- Electronic Circuits
- An archive of electronic circuits divided into categories such as power supplies, auto, computer circuits, sound/radio.
- 357
- Electronic Circuits
- Electronic circuit diagrams, software, tutorial, schematics, projects, and tools.
- 358
- Electronic Circuits Directory
- A collection of electronic schematics and projects, index of tutorials and design software.