Practical experience.

This article discusses I-V curves for passive components, voltage sources, and current sources.

In this article, we will take a detailed (but not too detailed) look at the electrical principles that allow us to detect the presence of a human finger using little more than a capacitor.

This project will help you get started with the Arduino, including a description of the different types of Arduinos, how to download the Arduino software development environment, and describe the different shields that are available for the Arduino along with the accessories you will need to develop Arduino projects.