This small ebook is the first of around 50 plus ebooks that cover the many areas of electronics and if finished would help in preparing an individual with a good basic understanding of electronics which is required when working as an Electronic Technician. Ebooks will cover DC, AC, semiconductors and digital electronics. I am also thinking of producing ebooks on robotics and coopper and fiber wiring.This ebook is rather small but subsequent ebooks could be quite large as determined by the subject matter.