If you are a student of the Energy department at AAU, you are going to attend a course at the second semester called “Introduction to Electrical Engineering” also referred to as “DC”. This is a basic course on different direct current electrical components, how they act and which rules apply to them. While I was studying for my exams in this course, I came across a website called Electronics tutorials. The website contains tutorials on many different elements within the electronics world. I can highly recommend it for use as a supplement to the DC course at AAU.