Build it. Wire it.
Run it. Watch real physics take over.
125+ real components, a true physics engine, and free calculators — with cloud sync across every device.
Download E-Light
Free to test. One subscription unlocks Pro on every platform you sign in on.
iOS, Android, and macOS on their app stores · Windows as a direct download.
Looks simple. Solves like an engineer.
Most circuit apps animate a lie. The serious ones need a manual. E-Light is the rare third thing — drag, drop, run, and real physics takes over.
This isn't a simulation of a simulation. It's the real math.
Under the canvas runs a modified nodal analysis (MNA) engine — the same class of solver inside professional, industry-standard circuit tools. Every time you touch a wire, it rebuilds the network and solves it. Series bulbs dim. Motors draw real current. A wrongly-wired seal-in just doesn't latch.
(assets/simulator.mp4)
Solves your whole circuit, live
Real MNA physics on every change. Correct voltage, current and power — series, parallel and three-phase. No scripted animations, no fake flow.
125+ components that behave
Contactors, MCBs, RCDs, overload relays, VFDs, timers, 3-phase motors, CTs, energy meters. Wire any one to any other — the engine works out the rest.
Make it fail — safely
Overload a breaker and watch it trip. Drop a phase and watch the relay react. Push a panel to its limit with zero risk, zero smoke — then do it a hundred more times.
Live readouts, like a test bench
Ammeters, voltmeters and 1-/3-phase energy meters read true solved values. The Live Simulation panel shows V, A and kW the instant you hit Run.
All the physics. None of the pain.
Professional tools are powerful — and brutal. Endless menus, licence dongles, a week of training before you light a single bulb. E-Light keeps the screen friendly enough for a first-year student and hides the real solver where you don't have to think about it.
You shouldn't need an engineering degree to use it. You just get engineering-grade results.
A whole panel shop, in eight categories.
Power supplies
3-phase & 1-phase supplies, generator, battery, 24 VDC PSU.
Switches
Push-buttons, selectors, emergency stop, limit, float & foot switches.
Protection
MCB, RCD, MCCB, fuses, overload & motor-protection relays.
Control gear
Contactors, relays, timers, VFDs, solenoids, solid-state relays.
Sensors & PLC
Proximity, photoelectric, level, pressure, temperature, PLC screen.
Motors & loads
3-phase & single-phase motors, bulbs, heaters, fans, pilot lights.
Metering
Ammeter, voltmeter, 1-/3-phase energy meters, CT, transformer.
Panel hardware
Terminals, terminal blocks, wire nuts, busbars, empty panels.
20 engineer-grade calculators. Built to standard.
The real ones — with the real fields and the real standards behind them. IEC, NEC, ISO 8528, IES. Validated against published worked examples. And with Pro, every calculator reveals the equation behind the result — so you can check the formula, not just trust the number.
Fundamentals
Sizing & selection
Protection & fault
Power & backup
Building design
Built for everyone who works with current.
Engineers
Prove the design before the budget. Validate control logic and protection coordination on screen, then size it with 20 built-in calculators. Ship with confidence.
Technicians
Drill motor-control wiring — DOL, reversing, star-delta, seal-in — until it's reflex. Diagnose faults without ever pulling a cover.
Students
Stop memorising diagrams. Watch the current move. Understand why it works. The components are the exact ones waiting for you on the job.
A Modern Electrical Lab in Every Classroom
A full electrical lab, on every student's device — for a fraction of the cost of one workbench. No shared bench, no consumables, no waiting your turn.
Bring E-Light to your school- No physical equipment required
- Safe experimentation — no live voltage, no risk
- Learn anywhere — class, home, on the bus
- Supports real, practical electrical education
Test it free. Go Pro when you're hooked.
Free
- The simulator — the real engine
- 10 components to test the simulator
- All 20 calculators
- Save projects locally on your device
- Supported by occasional ads
Pro
- Everything in Free, unlocked
- All 125+ components unlocked
- No ads — ever
- See the equation behind every calculator
- Cloud sync — build on one device, continue on another
- One subscription — every platform
Education
- Volume access for a class or cohort
- Bring the lab to every student
- Built to grow with your program
Download the app, create your account, and subscribe right inside it — billed securely through the App Store or Google Play on mobile, the App Store on Mac, or a secure web checkout on Windows.
Everything you'd want to ask.
Is it a real simulator or just animations?
Real. E-Light solves your circuit with modified nodal analysis every tick — the same math behind professional simulation tools. The behaviour is physics, not a script.
Do I need internet to use it?
No. The engine runs entirely on your device. An account and connection are only needed for cloud sync and your subscription.
Will one subscription cover all my devices?
Yes — iPhone, Android, Mac and Windows, all under one account.
Is there really a free version?
Yes. The simulator and all 20 calculators are free — with 10 components to test, local saves, and occasional ads. Pro removes the ads, unlocks all 125+ components, reveals the equation behind every calculator, and adds cloud sync so you can build on one device and continue on another.
I'm an instructor — can my class use it?
Absolutely. It's a safe, zero-equipment lab for every student. Reach out about education plans and we'll find a fit for your class size.
Bringing E-Light to a class or team?
Schools, universities and training centres — tell us your size and goals and we'll put together a custom quote. Everyone else, say hello.
The lab is open. Go build something.
Buy once and E-Light follows you everywhere. Start a circuit on your Mac, finish it on your phone — your projects and your plan live in your account, not your device.
ONE SUBSCRIPTION · FOUR PLATFORMS · ZERO EXCUSES