Integrated Circuit Design:
ElectricVLSI
Cadence

Links:
Spice Model Files
Cadence tools manuals

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Embedded Systems:
Arduino Basics
FPGAs
Eagle PCB
Raspberry Pi: Part 1, Part 2, Part 3

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Software:
Vim and Git
C++ (Using Netbeans and Cygwin)

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Robotics:
Analog 2-Wheel Robot Car: Part 1, Part 2 (in progress)

Others
pcard