Interactive Simulation · Intuitive Understanding of Circuit Principles
Grouped by knowledge modules — click a card to start an immersive learning experience
Adjust voltage and resistance with sliders; current and power update instantly. Explore V–I and P–R curves with automatic unit conversion.
Switch between series and parallel modes to explore equivalent resistance, divider ratios, and voltage or current distribution.
Change any resistor in a multi-loop DC circuit and see how KVL and KCL remain satisfied as voltages and currents redistribute.
Adjust the bridge-arm resistors to explore balance and see the galvanometer current’s direction and magnitude change.
Simplify active two-terminal networks and verify that their Thevenin or Norton equivalents produce the same load voltage and current.
Analyse a linear circuit with two independent sources, then add their individual responses to verify superposition step by step.
Vary a load connected to a Thevenin source and trace the power-versus-resistance curve to locate the maximum-power condition.
Compare the impedance and voltage-current phase relationships of R, L, and C in sinusoidal steady state.
AC response of a purely resistive circuit: voltage and current waveforms are perfectly in sync, with dynamic demonstration of resistance's effect on amplitude.
Inductive reactance is proportional to frequency; current lags voltage by 90 degrees, with energy storage characteristics and frequency response curves.
Capacitive reactance varies with frequency under AC; current leads voltage by 90 degrees, with dynamic charging/discharging process.
Power characteristic curves for inductors and capacitors, with dynamic demonstration of power factor and reactive power.
Passes low-frequency signals while attenuating high-frequency components; adjust the magnitude response and cutoff frequency interactively.
Attenuates low-frequency components while passing high-frequency signals, with phase lead characteristics and cutoff frequency visualization.
Passes signals within a specific frequency band, with real-time display of center frequency and bandwidth.
Suppresses signals within a specific frequency band, with clear notch characteristics.
At resonance, impedance is at a minimum and current is at a maximum. See how the quality factor Q sharpens the response.
Under current source excitation, at resonance admittance is minimum, impedance is maximum, and terminal voltage reaches its peak. Quality factor Q affects the voltage peak sharpness.
Adjust the coupling coefficient k to compare the equivalent inductance of series-aiding and series-opposing coupled coils, including the T-equivalent model.
Adjustable turns ratio n: compare primary/secondary voltage and current waveforms, verify V2/V1=n, I2/I1=1/n, and impedance transformation.
Explore the RC transient response and see how the time constant τ shapes exponential charging and discharging.
Transient process of RL circuit: time constant tau=L/R, current exponential rise/fall, and magnetic field energy storage changes.
Explore the step response of a series RLC circuit in underdamped, critically damped, and overdamped states, with live s-plane pole tracking.
Build a square wave from sinusoidal harmonics and observe spectral content and the Gibbs phenomenon.
See how a triangle wave’s harmonic amplitudes decay as 1/n², allowing the Fourier series to converge quickly.
Sawtooth wave contains all integer harmonics (both odd and even), amplitudes decay as 1/n, forming a complete comparison series with square/triangle/trapezoidal waves.
Trapezoidal wave spectral characteristics: flat top and sloped edges affect harmonic decay, compared with square and triangle wave harmonic differences.
Three-phase sinusoidal voltage waveforms with equal amplitudes and 120° phase differences, with dynamic display of symmetry and phase sequence.
Compare Y and Δ load connections under the same three-phase source and verify their √3 voltage and current relationships.
Change one load in a three-phase four-wire system to observe neutral-point displacement, neutral current, and the updated phasor diagram.
Covers fundamental circuit concepts, Kirchhoff's laws, equivalent transformations, systematic analysis methods, and circuit theorems (superposition, Thevenin, Norton, maximum power transfer).
Phasor method analysis of sinusoidal steady-state circuits: impedance and admittance, four types of power, power factor correction, resonance circuits, coupled inductors and ideal transformers.
Switching laws, first-order circuit zero-input/zero-state/complete response, three-element method, step and impulse response, second-order circuit damping classification.
Z/Y/T/H parameter equations, reciprocity and symmetry conditions, cascade/parallel/series equivalents, and network connection analysis methods.
Each interactive module lets learners adjust parameters and see the resulting waveforms and curves immediately, making core circuit principles easier to grasp. The site is optimised for desktop and tablet use; a modern browser is recommended.
The collection covers DC circuits, sinusoidal steady state, resonance, filters, transients, Fourier series, and three-phase circuits. This index brings the simulations together for classroom demonstration and independent exploration.
Circuit Analysis Fundamentals Teaching Aid · Dynamic Simulation Toolkit | 30 Interactive Modules, Organized by Knowledge Domain
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