How do I simulate a power supply?

Open this page and use the live Buck Converter 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 power supply from your own measurements.

Use case · powered by Buck Converter

Buck Converter for a power supply

Simulate a power supply live in your browser. This runs the real Buck Converter 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

Buck ConverterLive

step-down switching regulator

Controls

Presets

Input Vin (V)

Duty cycle D

Inductor L (µH)

Switching freq (kHz)

Load current (A)

A buck converter chops the input at a fast switching frequency; the inductor and capacitor average it to a lower DC output, Vout = D·Vin. Bigger inductors and faster switching shrink the current ripple. Educational tool.

▶ Run in Python

Data Inspector

Output voltage5.04 V

Inductor ripple ΔIL0.29 A

Ripple / load29%

Modecontinuous

Governing equation

V_{o u t} = D \cdot V_{in} = 0.42 \cdot 12 V = 5.04 V Δ I_{L} = \frac{( V _{in} - V _{o u t} ) D}{L f _{s w}} = 0.29 A

Reading this result: Vout tracks D·Vin regardless of load; the ripple you see is set by L and switching frequency, not by the output voltage itself.

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

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About this simulation

The full Buck Converter tool models a power supply 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 Buck Converter

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Other ways to simulate a power supply

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

Frequently asked questions

How do I simulate a power supply?: Open this page and use the live Buck Converter 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 power supply from your own measurements.