Before diving into building electric circuits, lighting up LEDs, and creating food-serving robots, we must first understand the basics. So, what exactly is electricity?

Electricity is the flow of electrical charge and is one of the most widely used forms of energy. When we talk about “electronics”, we’re essentially manipulating electricity to accomplish a particular task.

Electronic circuits like the one displayed on the right are often vast arrays of components and conductors, but they are all made up of much smaller and less complicated pieces. Once you appreciate some of these smaller circuits, you can move on to working with more advanced circuits.

In this lesson, we’ll take a look at:

  • How to define an electronic circuit
  • Understand the electrical properties, voltage, current, and resistance and how they relate to each other
  • Explore Ohm’s Law and its usage
  • Explore schematic diagrams and their components

So without further delay, let’s get started!


The image in the workspace shows a complex circuit board that consists of a lot of electrical networks otherwise known as circuits. Each of these circuits can be made up of other smaller circuits. To begin to understand electronic circuits like this or electronics at any level we must understand the basic principles of electricity and electronics.

Move to the next exercise to get started.

Take this course for free

Mini Info Outline Icon
By signing up for Codecademy, you agree to Codecademy's Terms of Service & Privacy Policy.

Or sign up using:

Already have an account?