Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For Students · Buck Converter

Buck Converter for a capacitor bank

Built for students learning it for a class or exam. See the concept move instead of memorizing formulas — and check your homework intuition. Simulate a capacitor bank live below — adjust the inputs and watch it respond, right in your browser.

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.

or unlock everything with Pro →

Also for:Researchers Educators Engineers Hobbyists & Makers K-12 Students First Responders General version →

More with Buck Converter

Buck Converter for an RLC circuit Buck Converter for a power supply Buck Converter for a transformer Buck Converter for a DC motor Buck Converter for an op-amp filter Buck Converter for an antenna Buck Converter for a transmission line Buck Converter for a PCB trace

Frequently asked questions

Is this good for students?: Yes — this version of "Buck Converter for a capacitor bank" is framed for students learning it for a class or exam. See the concept move instead of memorizing formulas — and check your homework intuition.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.