Electronics Resources

On-Line References

wikipedia.org Has a wide variety on information on electronics. For Example:
Geoff Martin's Audio Textbook (Audio Electronics Section).

Tony R. Kuphaldt's comprehensive set of pdf formatted electronics textbooks.

Electrical Engineering Training Series - a comprehensive series of online textbooks in electrical engineering. See the Solid-State Devices and Power Supplies section for a tutorial on diode and transistor function and circuits. Resistor Color Codes

Analog to Digital Conversion Tutorial - Note the ADC on the Atmel processors are the successive approximation type.

On-Line Tools

The Electronics Calculator - Handy calculator for Ohm's law, filter frequency responses etc.... Resistor Color Code Calculator