I’m excited to announce the release of my latest course and companion book, Introduction to Electronics Filters. This project is the next step in my mission to make electronics accessible and practical for everyone, whether you’re a beginner or looking to deepen your understanding of electronic circuits. The first step is Introduction to Electronics – The Basics, which I published in December 2025.
Why I created this course and book
After the publication of my foundational course, Introduction to Electronics – The Basics, I noticed that many students wanted to go further—especially into the world of filters. There are many reasons for this, but at the core is that the study of filters helps students understand how circuits composed of the fundamental discreet components (resistors, capacitors and inductors), behave. You really can’t jump to other topics in electronics without this foundational knowledge of filters, and RC, RL circuits. Filters are everywhere in electronics, from audio systems to communication devices, and understanding them is essential for anyone who wants to design or troubleshoot real-world circuits. I designed this course and book to give you a clear, hands-on introduction to the most important types of filters, how they work, and how you can use them in your own projects.
What you’ll learn
In this course and book, you’ll start with the basics: what filters are, why they matter, and the key concepts behind their operation. I’ll guide you through the main types of filters—low-pass, high-pass, band-pass, and band-stop—using simple language and practical examples. You’ll learn how to analyze and design these filters, both with resistors and capacitors (RC filters) and with operational amplifiers (active filters).
You’ll also get to explore real-world applications, such as audio equalizers and radio receivers, so you can see how filters are used in devices you encounter every day. By the end, you’ll be able to recognize, build, and experiment with a variety of filter circuits.
How the course and book are organised
I’ve structured the course and book to make learning as smooth as possible. Each chapter and section builds on the previous one, so you can progress step by step. I start with the theory, but quickly move to practical experiments and demonstrations. You’ll find clear explanations, circuit diagrams, and worked examples throughout.
To help you practice and check your understanding, the course includes quizzes at the end of each section. These quizzes are designed to reinforce key concepts and help you identify any areas where you might want to review.
Hands-on experiments and simulations
One of the things I’m most proud of in this course is the emphasis on hands-on learning. You won’t just read about filters—you’ll build them, test them, and see how they work in real time. I use the Analog Discovery 3 (AD3) for many of the experiments, so you can follow along with your own hardware if you have it. If you don’t, you can still benefit from the detailed demonstrations and explanations.
I also make extensive use of circuit simulators. You’ll learn how to use free online tools to simulate filter circuits, analyze their behavior, and experiment with different component values. This approach lets you try out ideas quickly and safely, and helps you develop intuition for how filters respond to different signals.
Ready to start?
If you’re ready to take your electronics skills to the next level, I invite you to check out the course and book. You’ll find detailed information about the curriculum, sample lessons, and enrollment options on the course page.
Learn more about Introduction to Electronics Filters
I look forward to seeing you in the course and helping you unlock the power of electronic filters!