Practical Circuit Engineering
Bridge the gap between schematic diagrams and working bench hardware. Learn to select components, drive real-world loads, condition analog signals, and diagnose parasitic gremlins.
Like Duolingo, but for Practical Circuit Engineering. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
22 levels across 3 sections, about 44 minutes end to end, roughly 9 days at five minutes a day. It moves through Active Switching and Bench Diagnostics, Conditioning Signals and Regulating Power, and Robust Interfacing and Circuit Protection. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android
Key ideas in Practical Circuit Engineering
- A multimeter draws almost zero current, showing full open-circuit voltage across tarnished contacts.
- When active loads draw current, high contact resistance causes an immediate internal voltage drop.
- A sudden voltage collapse under load causes brownout resets in digital logic chips.
- Full-length breadboards often have a central physical split in their power and ground distribution rails.
- Bridging both the positive and ground tracks with jumper wires is required to power both halves.
- A split rail creates a completely unpowered dead zone that mimics faulty components.
- A current-limited power supply safely energizes shorted rails without burning traces or clips.
- Current flows directly toward the lowest-impedance fault, causing small microvolt drops along metal conductors.
- The shorted component displays the smallest voltage drop across its leads because current converges there.
- Parallel breadboard tie clips act as parasitic capacitors of roughly 2 to 5 picofarads.
- Parasitic capacitance forms a low-pass filter with circuit resistance, rounding off sharp digital edges.
- Fast-switching edge rates couple high-frequency noise into adjacent rows as crosstalk.
- Large-diameter rectifier or terminal leads yield the spring clips beyond their elastic limit.
- Overstretched tie clips fail to maintain wiping pressure against standard 22-24 AWG wire leads.
- Test probe pressure temporarily restores contact, creating elusive 'heals-while-probed' bugs.
- Datasheet hFE only applies in linear amplification and drops drastically near saturation
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 Practical Circuit Engineering 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.
Your rail reads 5 V resting, but plunges to 2.5 V the moment a motor turns on. What happened?
Get it right to open this lesson and 21 more in the app.
Where Practical Circuit Engineering takes you
- 1
Active Switching and Bench Diagnostics
- Triage on the Breadboard
- Transistor Switching and Power Loads
- 2
Conditioning Signals and Regulating Power
- Power Regulation and Supply Cleanliness
- Operational Amplifiers in Real Circuits
- Passive Filtering and Decoupling
- 3
Robust Interfacing and Circuit Protection
- Inductive Loads and Transient Protection
- Sensor Conditioning and Logic Interfacing
3 sections · 7 units · 22 levels. Built to play, not to enroll.
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
Practical Circuit Engineering is taught in the Professor style: clear, structured, thorough. 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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Start Practical Circuit Engineering today.
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