- All About Circuits
- All About Electronic Circuits for Kids - By Mark Houlahan (recommended by the Lyndhurst STEM Club)
- American Radio History - archive of old electronics and radio mags
- Circuit Theory
- Embedded Artistry - an amazing website dedicated to designing, programming, manufacturing, and debugging embedded systems.
- Javascript® Electronic Notebook by Martin E. Meserve
- Radio Receivers, from crystal set to stereo - MikroElectronica Books
- Radio Hobbyist's Designbook by Hans Summers
- Transistors - sparkfun
- Understanding Electronics Components - MikroElectronica Books
Some of my favourites:
- Embedded.fm
- Ham Radio Workbench
- MacroFab Engineering Podcast
- SolderSmoke podcast abd blog
- The Amp Hour
- Unnamed Reverse Engineering Podcast
Some of my favourites:
- Electronics Design Checklist - Hank Wallace
- A Short Guide On Motor Electrical Noise Reduction
- De-coupling
- List of 4000-series integrated circuits
- List of 7400-series integrated circuits
- Graphical Resistor Calculator - Danny Goodman
- Electronics Calculators Index - large list of online calculators
- Capacitor Code Calculator
- Coil Inductance Calculator
- MUST online calculators for electronics
- Online calculator - 4 digit SMD resistor
- 555 Timer calculators:
- Visual555 - my version of an astable/monostable calculator with animations
- 555 calculator
- 555 Timer - Frequency and Duty Cycle Calculator
- 555 astable calculator
- 1776 effects - pedals and kits
- 555-timer-circuits
- Dick Cappels' Project Pages
- DIY stompboxes
- DiscoverCircuits
- electroschematics
- ePanorama.net - Circuits
- General Guitar Gadgets
- Homebrew RF Circuit Design Ideas
- LM555 and LM556 Timer Circuits
- Max Robinson's Fun With Transistors
- Model Railroad & Misc. Electronics
- N5ESE's Ham Radio Page
- Radio Frequency Schematics
- Talking Electronics
- www.changpuak.ch - An archive of useful, funny and educational projects