CircuiTikZ

Circuitikz is a computer program that you can use to draw pictures of electrical circuits. It can help you to understand how circuits work, and how to design them. All you have to do is draw lines and shapes on your computer, and the program will turn them into a circuit diagram. You can even add labels to your diagrams, which can help to explain how everything works. When you’re finished, the program will show you what the circuit would look like in real life.