How do I simulate an LED driver?

Open this page and use the live RF Front End 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 an LED driver from your own measurements.

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RF Front End for an LED driver

Simulate an LED driver live in your browser. This runs the real RF Front End 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

Filter Designer

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Analog Filter DesignerLive

RC & RLC frequency response

Controls

Presets

Resistance R (Ω)

Capacitance C (nF)

Passive filters shape a signal's frequency content with resistors, capacitors, and inductors. An RC low-pass or high-pass has a cutoff at 1/(2πRC) where the response drops 3 dB; an RLC bandpass resonates at 1/(2π√(LC)) with sharpness set by its quality factor Q.

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Data Inspector

Cutoff fc1.6 kHz

Resonance f₀5.0 kHz

Quality factor Q0.32

Governing equation

∣ H (f) ∣ = \frac{1}{1 + ( f /1592 ) ^{2}}

Reading this result: Low-pass: signals below the 1.6 kHz corner pass, above it they roll off at 20 dB/decade, and the response is exactly 3 dB down right at the corner.

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

↓

Transmission Line

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Transmission Line & VSWRLive

impedance matching · reflections

Controls

Speed1×

Presets

Line impedance Z₀ (Ω)

Load resistance RL (Ω)

Load reactance XL (Ω)

When a transmission line meets a load that does not match its impedance, part of the wave reflects. Incident and reflected waves combine into a standing-wave pattern measured by the VSWR. A perfect match (RL = Z₀, XL = 0) gives VSWR 1 and no reflection — the goal of every antenna and RF design.

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Data Inspector

Reflection |Γ|0.200

VSWR1.50 : 1

Return loss14.0 dB

Matchpoor

Governing equation

∣Γ∣ = \frac{Z _{L} - Z _{0}}{Z _{L} + Z _{0}} = 0.200, VSWR = 1.50

Reading this result: A large resistive mismatch reflects much of the wave, giving a high VSWR and deep nulls in the standing-wave pattern.

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

↓

Radio Range

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Radio Range / Link BudgetLive

VHF/UHF horizon + path loss

Estimated usable range

9.7mi

Controls

Presets

Base antenna (ft)

Portable height (ft)

Power (W)

Frequency (MHz)

Rx sensitivity (dBm)

Combines the radio horizon (1.23·(√h₁+√h₂), feet→miles) with a free-space link budget (EIRP minus path loss vs receiver sensitivity). Actual range depends on terrain, foliage, and buildings — treat this as a best-case planning estimate.

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Data Inspector

Radio horizon9.7 mi

Link budget147 dB

Limited byline-of-sight

Governing equation

FSPL = 20 lo g_{10} (\frac{4 π d}{λ}) = 147 dB (d = 9.7 mi, f = 155 MHz)

Reading this result: Range is capped by the horizon at 9.7 mi — raising the base antenna helps more than adding power here.

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

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About this simulation

The full RF Front End tool models an LED driver 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 RF Front End

RF Front End for an RLC circuit RF Front End for a power supply RF Front End for a transformer RF Front End for a DC motor RF Front End for an op-amp filter RF Front End for an antenna RF Front End for a transmission line RF Front End for a PCB trace

Other ways to simulate an LED driver

Fourier Transform for an LED driver Bode Plot for an LED driver Filter Designer for an LED driver PID Controller for an LED driver Transmission Line for an LED driver Op-Amp Circuits for an LED driver

Frequently asked questions

How do I simulate an LED driver?: Open this page and use the live RF Front End 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 an LED driver from your own measurements.