How do I simulate a resonant circuit?

Open this page and use the live AM / FM Modulation tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.

Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.

Can I use my own numbers?

Absolutely — every input is adjustable, and with data import you can drive a resonant circuit from your own measurements.

Use case · powered by AM / FM Modulation

AM / FM Modulation for a resonant circuit

Simulate a resonant circuit live in your browser. This runs the real AM / FM Modulation solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

For:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students First Responders

AM / FM ModulationLive

how radio carries sound

Controls

Presets

Modulation

Carrier frequency

Message frequency

Modulation index

Radio hides a low-frequency message inside a high-frequency carrier. AM varies the carrier's amplitude with the message; FM varies its frequency. FM resists noise better, which is why music stations use it. Educational tool.

▶ Run in Python

Data Inspector

ModeAmplitude (AM)

Carrier / message20 / 2

Modulation index0.70

Modulation depth70%

Governing equation

s (t) = (1 + 0.70 cos (2 π \cdot 2 t)) cos (2 π \cdot 20 t)

Reading this result: AM varies the carrier's amplitude with the 2 Hz message at 70% depth. The envelope stays positive, so a simple envelope detector recovers the message cleanly. The 20 Hz carrier is far above the message so the two separate at the receiver.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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About this simulation

The full AM / FM Modulation tool models a resonant circuit with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

More you can do with AM / FM Modulation

AM / FM Modulation for an RLC circuit AM / FM Modulation for a power supply AM / FM Modulation for a transformer AM / FM Modulation for a DC motor AM / FM Modulation for an op-amp filter AM / FM Modulation for an antenna AM / FM Modulation for a transmission line AM / FM Modulation for a PCB trace

Other ways to simulate a resonant circuit

Fourier Transform for a resonant circuit Bode Plot for a resonant circuit Filter Designer for a resonant circuit PID Controller for a resonant circuit Transmission Line for a resonant circuit Op-Amp Circuits for a resonant circuit

Frequently asked questions

How do I simulate a resonant circuit?: Open this page and use the live AM / FM Modulation tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?: Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?: Absolutely — every input is adjustable, and with data import you can drive a resonant circuit from your own measurements.