Electronics for hobbyists - Direct current

This is heathkit's individual learning program, number EE-3140, "Elect-tronics for hobbyists."It is designed to give you a thorough foundation in the basic and intermadiete principles of electronics. Starting at the very beginning, it answers the questions: "What is an electron?" this is an important question because electronics is the science that studies and controls the behavior of electrons. Therefore, you must be familiar with the electron and its behavior to fully inderstand electronics.