Beginning Electronics
Welcome to Beginning Electronics — a free, hands-on textbook where you learn electronics the best way there is: by building real circuits with your own two hands. No soldering iron. No computer programming. No expensive lab equipment. Just a solderless breadboard, about $50 worth of parts, and the growing suspicion that you can make just about anything light up, spin, beep, or sense the dark.
Hi, I'm Volt!
I'll be tagging along on every chapter to point out the tricky bits and
cheer you on when a circuit finally clicks. Understanding electronics is a
genuine superpower — and you're about to unlock it. Let's light it up!
What You'll Build
By the end of this book, you'll have built circuits that:
- Light an LED without letting out the magic smoke
- Turn two push buttons into logic gates — AND and OR, built from nothing but wires
- Dim a light by hand with a potentiometer
- Sense darkness and switch on a night light all by itself
- Spin a motor with a transistor doing the heavy lifting
- Blink and beep on a schedule you design with a 555 timer chip
- Command eight LEDs at once from just a few wires with a shift register
- Power real gadgets with voltage regulators, buck converters, and a signal generator
- Finish with a capstone project of your own invention
What's Inside
| 26 chapters | Sequenced so every new idea rests on one you already know |
| 500 concepts | Mapped in an interactive learning graph |
| 70+ MicroSims | Browser-based simulations you can experiment with right now |
| 16 hands-on labs | Step-by-step builds for your breadboard |
| 8 project kits | Real-world kits — regulators, converters, busy boards, and more |
No parts yet? No problem.
Every MicroSim runs right in your browser, so you can wire up a circuit,
break it, and fix it without owning a single resistor. When your kit
shows up, you'll already know what you're doing.
Who This Book Is For
This book is written for students in 5th through 12th grade (ages 10-18) in classrooms, afterschool programs, and maker clubs — and it's written plainly enough that hobbyists, parents, mentors, and adult learners can pick it up and work straight through.
No prior experience required. No electronics background, no programming, and no strong math. If you can add and multiply small numbers, you have everything you need for the Ohm's Law activities.
What You Need to Get Started
- A solderless breadboard — no soldering anywhere in this course
- A safe low-voltage power source — a 5V USB supply or a battery pack
- A ~$50 kit of parts — resistors, LEDs, buttons, a potentiometer, a photoresistor, transistors, capacitors, a small motor, a 555 timer, and a 74HC595 shift register
Our Getting Started section walks you through exactly what to buy, where to buy it, and how to power it safely. Every circuit in this book runs on low-voltage DC — never wall power.
Custom Lesson Plans with AI
This is an intelligent textbook, which means it can adapt to you. Use generative AI tools to build a lesson plan customized to your situation. A good prompt includes:
- Your age or grade in school
- What you want to learn
- Any lessons you've already finished
- What parts you have on hand
- How much time you have available
You'll get back a lesson plan and a circuit diagram built for exactly what you asked for. See Generating Lessons for prompts you can copy and adapt.
How to Use This Book
Use the navigation menu on the left to explore:
- Getting Started — what to buy and how to power it safely
- Chapters — the main path, in order, from voltage to capstone
- Hands-on Labs — build-it-yourself circuits for your breadboard
- MicroSims — interactive simulations to experiment with
- Kits and Projects — real-world kits and project ideas
- Learning Graph — see how all 500 concepts connect
There's also a search box in the upper right corner when you're hunting for something specific.
Start Here
New to electronics? Begin with Chapter 1: Electricity Basics and work forward — each chapter builds on the one before it.
Already have your kit on the table and can't wait? Jump to Chapter 6: Meet Your Breadboard, where the reading stops and the building starts.
One more thing before you go
That first LED you light up is a moment you'll remember. Everything after
it is just adding more parts to the same idea. Nice wiring, builder!
What Comes Next
This book is the companion volume to Learning MicroPython and Physical Computing. This course builds deep, tactile intuition for how electricity and components actually behave; that one picks up right where this leaves off, adding microcontrollers and code to bring your circuits to life with software. Finish both, and you'll have a rare combination: real hardware fluency and real programming fluency.
About This Book
Beginning Electronics is a free, open intelligent textbook licensed under CC BY-NC-SA 4.0 for non-commercial use — teachers and students are welcome to copy, remix, and adapt it. The MicroSims were built with the help of generative AI tools; see the MicroSims site for more examples.
Questions, corrections, or a project you want to show off? Get in touch.
Have fun!
Dan McCreary — Lead Content Author