Hands-On Electricity
Learn how electricity moves through circuits and how to measure it with confidence. From basic closed loops to multimeter diagnostics and power safety, build a clear working understanding of electrical systems.
Like Duolingo, but for Hands-On Electricity. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
24 levels across 4 sections, about 48 minutes end to end, roughly 10 days at five minutes a day. It moves through Making Current Flow, Measuring with a Multimeter, Structuring and Protecting Circuits, and The Mechanism Beneath. It starts from scratch.
Free forever · No credit card · iPhone & Android
Key ideas in Hands-On Electricity
- Electricity only flows when there is an unbroken, complete loop leading from one battery terminal back to the other terminal
- A single wire creates a dead end, so electrical charges cannot circulate
- A working circuit needs a source to push current, conductors to guide it, and a load to do useful work
- The load uses the electrical energy, preventing the power source from draining uncontrollably
- Metal wires act as low-resistance paths that guide the current between parts
- Opening a switch breaks the physical continuity of the conductive path
- Air is an insulator at ordinary household voltages, so current stops flowing entirely across the gap
- The power source remains active and ready to deliver energy the instant the gap is closed
- A short circuit happens when current finds a path with almost no resistance, skipping the load
- Without a load to restrict energy flow, current spikes dramatically, causing wires and batteries to get dangerously hot
- Electricity takes all available conductive paths, but the bulk surges through the path of least resistance
- Polarized components like LEDs only allow current to flow through them in one specific direction
- If an LED is wired backward relative to the battery's positive and negative terminals, it blocks current and stays dark
- Flipping a polarized component around aligns it with the loop's direction of current
- Voltage measures the electrical push or difference between two separate points, not a quantity at a single spot
- Touching two probes to the exact same point measures zero difference in push
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Hands-On Electricity the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What happens if you only connect one wire from a battery to a light bulb?
Get it right to open this lesson and 23 more in the app.
How to learn Hands-On Electricity, step by step
Go in order. 24 short levels across 4 sections, about 48 minutes in all, five minutes a day.
- 1
Making Current Flow
- Building Your First Closed Loop
- Working with Voltage, Current, and Resistance
- 2
Measuring with a Multimeter
- Reading Voltage and Verifying Continuity
- Measuring Current and Resistance Safely
- Tracking Down Circuit Faults
- 3
Structuring and Protecting Circuits
- Wiring in Series and Parallel
- Managing Power, Heat, and Safety
- 4
The Mechanism Beneath
- How Charge and Fields Actually Move
4 sections · 8 units · 24 levels. Built to play, not to enroll.
Questions about Hands-On Electricity
How do I learn Hands-On Electricity?
Go in order: start with Making Current Flow, then Measuring with a Multimeter, then Structuring and Protecting Circuits, then The Mechanism Beneath. On Tomo that's 24 short levels, about 48 minutes in all, played five minutes a day. Start free and play the first level in under a minute.
Is there a Duolingo-style app for Hands-On Electricity?
Yes. Tomo works like Duolingo: short daily lessons, streaks and quick quizzes. Hands-On Electricity is one of its free courses, and you can type any other topic to get a course of your own.
Is the Hands-On Electricity course free?
Yes. Hands-On Electricity is playable on Tomo's free plan, which doesn't expire. No credit card, no waitlist. Download the app and start your first lesson.
How long does it take to learn Hands-On Electricity?
24 levels across 4 sections, about 48 minutes of play in total. It's built for five minutes a day, so you finish it a little at a time instead of all at once.
Do I need any background to start Hands-On Electricity?
No. It's pitched at a beginner level, so it starts where you are and builds up. If you can tap a phone, you can start.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
Hands-On Electricity is taught in the Explain Like I'm 5 style: no big words. promise.. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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How Electrical Circuits Work
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Mastering the Flow: Practical Electronics
Move beyond simple batteries and bulbs to design circuits that solve real problems. Master the math of power, troubleshoot like a pro, and understand how modern gadgets actually think.
Hands-On Electronics
Build, control, and troubleshoot real physical circuits without frying components. Move from lighting your first LED safely to switching power with transistors and hunting down dead connections with a multimeter.
Everyday Circuit Fundamentals
Understand how electricity actually moves, how Ohm's law shapes every circuit, and how to wire, test, and troubleshoot basic electronics with intuitive mental models.
Start Hands-On Electricity today.
Download Tomo, search Hands-On Electricity, and play your first lesson in under a minute.