Do I need to install anything?

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

For First Responders · Buck Converter

Buck Converter for an LED driver

Built for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field. Simulate an LED driver 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.

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Frequently asked questions

Is this good for first responders?: Yes — this version of "Buck Converter for an LED driver" is framed for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.