An Australian consulting company maintains this valuable Internet resource for electrical engineers. Many theorems and formulae are included, ranging from fundamental voltage and current laws to transformers and three-phase circuits. The site lists common practices for reducing circuits into simpler representations, which facilitates the process of circuit analysis. Anyone who designs or evaluates...

This incredibly comprehensive site offers 24 free online modules that explain a wide variety of concepts within electrical engineering. Each module is presented in a style similar to that of a textbook, with detailed explanations of concepts, discussions of underlying theory, and practice problems with solutions. Topics include electromagnetics, digital computers and logic, fiber optics, and many...

MIT's OpenCourseWare program has been a hit over the past few years, and people from around the globe have written in to praise the high-quality and free educational materials offered on the site. One of the more recent offerings is this introductory course on electrical engineering and computer science. After conversations with colleagues and OpenCourseWare users, MIT decided to create a course...

Six massive volumes comprise this comprehensive online reference of electric circuits. The first three volumes cover analog circuits, including direct current, alternating current, and semiconductors. Digital systems are the topic of the fourth volume, and a quick reference guide to frequently used equations and practices constitutes the fifth. Each volume can be downloaded as a single file for...