Circuits Simulators

AC Circuit Impedance Simulator — RLC Series/Parallel, Resonance & Bode Plot

Circuits

AC Circuit Impedance Simulator: Calculate impedance, resonance, Q-factor and phase angle for RLC circuits with real-time Bode plot visualization.

Series RLC Circuit Simulator — AC Impedance and Resonance

Circuits

Series RLC circuit simulator for AC impedance, resonance frequency, and Q factor analysis with frequency sweep visualization.

ADC Quantization Noise & SNR Simulator

Circuits

Every analog-to-digital converter has to round a continuous voltage to one of 2^N discrete codes.

ADC Sampling Jitter SNR Simulator

Circuits

ADC jitter SNR simulator showing waveform sampling, SNR curves, and error analysis. Learn jitter effects on signal integrity at high frequencies.

Band-Pass Filter Simulator — Series RLC Resonance and Q-factor

Circuits

Visualize the frequency response of a series RLC band-pass filter. Compute resonant frequency, Q-factor, -3 dB bandwidth, gain and phase at any probe frequency.

Biosensor EIS (Electrochemical Impedance Spectroscopy) Simulator

Circuits

Biosensor EIS (Electrochemical Impedance Spectroscopy) Simulator: Compute the Randles equivalent circuit response for a label-free biosensor and watch the Ny…

BJT Amplifier AC Analysis (CE/CB/CC)

Circuits

Analyze BJT amplifier AC performance: voltage gain, impedance, and Bode plots for Common Emitter, Base, and Collector configurations. Compare key formulas.

RC Capacitor Charge/Discharge Simulator — τ=RC

Circuits

Simulate RC circuit charging/discharging. Adjust R, C, V₀ to instantly see exponential curves, time constant τ=RC, and key equations.

Capacitor Charge/Discharge & Energy Simulator

Circuits

Simulate RC circuit charging and discharging in real time. View plots for voltage, current, and energy. Calculate time constant τ, max energy, and charge.

Circuit Builder — Ohm's Law & Series/Parallel Circuits

Circuits

Interactive Ohm's Law calculations. See electron flow and compute voltage, current, resistance, and power instantly.

Crosstalk in Coupled Lines Simulator

Circuits

A tool for calculating the "crosstalk" that appears between two traces running side by side on a printed circuit board.

DC Circuit Simulator

Circuits

Analyze series and parallel DC circuits with configurable voltage and resistor values. Learn circuit laws and practical engineering applications.

Electrical Grounding Resistance Calculator (IEEE 80 / Wenner)

Circuits

Calculate grounding system safety per IEEE 80. Compute resistance, touch & step voltages, and GPR from soil resistivity and electrode geometry.

Electromagnet Lifting Force Simulator

Circuits

Compute, in real time, how hard a current-carrying horseshoe electromagnet pulls on an iron plate.

High-Pass Filter Simulator — First-Order RC Filter Frequency Response

Circuits

Real-time first-order RC high-pass filter simulator. Get cutoff frequency, gain, phase and time constant, with a live Bode plot and AC-coupling waveform view.

Inductor & RL Circuit Transient Response Simulator

Circuits

Visualize RL circuit transient response in real time. See current, voltage, and energy for energizing, de-energizing, and AC modes. Automatically calculates time constant τ.

Kirchhoff Laws Simulator — Series-Parallel Resistor Circuit

Circuits

Kirchhoff Laws Simulator for series-parallel resistor circuits. Visualize KVL, KCL, current division, and voltage drops in real time for circuit analysis.

LC Circuit Oscillation Simulator — RLC Damped Oscillation

Circuits

Simulate RLC circuit behavior. Adjust L, C, R values to instantly visualize damped voltage waveforms, impedance resonance curves, and key parameters like resonant frequency.

LED Series Resistor Calculator

Circuits

Free LED current-limiting resistor calculator. From V_s, V_f, I_f and series count: ideal R, nearest E12 value, real current, resistor power and efficiency live.

Logic Gate Simulator — AND/OR/NAND/XOR/Adder/Flip-Flop

Circuits

Visualize logic gates and build circuits with auto-generated truth tables. Explore AND, OR, XOR gates, adders, and flip-flops in this interactive simulator.

Low-Pass Filter Simulator — First-Order RC Filter Frequency Response

Circuits

Visualize the frequency response of a first-order RC low-pass filter. Adjust R and C to inspect cutoff, gain, phase and time constant on a live Bode plot.

Magnetic Circuit & Reluctance Simulator

Circuits

Solve the magnetic flux flowing through the iron core of an electromagnet or inductor as a magnetic circuit built from reluctances.

555 Timer Astable Simulator

Circuits

555 Timer Astable Simulator focuses on nearby design assumptions and key metrics, giving a compact read on the current case and the trend that matters next.

Ohm's Law & DC Circuit Simulator — Voltage, Current, Resistance

Circuits

Slide V, I, R sliders and watch current flow animate in real time. Switch to circuit mode to analyze series, parallel, and mixed resistor networks instantly.

Op-Amp Circuit Simulator — Inverting, Integrator, Differentiator

Circuits

Visualize and simulate inverting, non-inverting, summing, and other key op-amp circuits in real time. See gain, phase shift, and waveforms instantly.

LC/RC Oscillator Design Calculator

Circuits

Calculate oscillator frequencies for Colpitts, Hartley, Clapp, Wien Bridge, RC Phase Shift, and Crystal circuits with real-time formulas and criteria.

Phase-Locked Loop (PLL) Simulator

Circuits

Design a phase-locked loop (PLL) that synthesises a high, accurately-spaced frequency by multiplying a clean reference by the divider ratio N.

Piezoelectric Transducer Coupling Coefficient (k) Simulator

Circuits

Piezoelectric Transducer Coupling Coefficient (k) Simulator compares how nearby design assumptions and key metrics shifts as the main assumptions change.

Piezoelectric Calculator

Circuits

Calculate d33/d31 coefficients, charge sensitivity, thickness-mode resonance frequency, and electromechanical coupling factor k33. Material presets for PZT-4, PZT-5H, PV…

Poynting Vector Simulator — Plane Wave Power Flux

Circuits

The Poynting vector simulator computes the instantaneous and time-averaged intensity of a plane electromagnetic wave in vacuum from E0, frequency, position and time.

RC/RL Circuit Transient Response Analyzer

Circuits

Analyze RC/RL circuit transient response instantly with our free online calculator. Visualize voltage and current over time. No sign-up required.

LCR Resonance Circuit Simulator — Impedance, Phase & Q-Factor Calculator

Circuits

Visualize real-time impedance and phase response for series/parallel LCR circuits. Instantly compute resonant frequency, Q-factor, and bandwidth with this interactive simulator.

UHF RFID Link Budget & Backscatter Distance Simulator

Circuits

UHF RFID Link Budget & Backscatter Distance Simulator: Size up the communication range of a passive UHF RFID (EPC Gen2) deployment from reader EIRP, tag sens…

RLC Circuit Resonance Simulator — Impedance, Q Factor & Bandwidth

Circuits

Interactive RLC circuit resonance simulator. Visualize impedance, current vs. frequency, and phasor diagrams. Calculate resonant frequency, Q factor, and bandwidth.

Schmitt Trigger Simulator

Circuits

Design a non-inverting Schmitt trigger that uses positive feedback to obtain two switching thresholds (hysteresis).

PN Junction Diode I-V Characteristic Simulator — Shockley Equation

Circuits

Simulate PN diode I-V curves with the Shockley equation. Adjust material, ideality factor, and temperature to explore semiconductor physics.

Shockley Diode Simulator — pn Junction I-V Characteristic

Circuits

Shockley diode simulator: real-time I = I_S(exp(V/nV_T)-1) for pn junction. Thermal voltage, dynamic resistance, power, and semi-log I-V curve with temperature comparison.

Sigma-Delta ADC Oversampling Noise Shaping SNR Simulator

Circuits

Pick the OSR, modulator order and quantizer bits of a ΣΔ ADC and see the in-band SNR, ENOB, sampling frequency and power update in real time.

NTC Thermistor Simulator — Resistance-Temperature Characteristic

Circuits

NTC thermistor simulator. Compute resistance, voltage-divider output and sensitivity from R0, B constant and temperature using the beta-parameter model in real time.

Thevenin Equivalent Simulator — Maximum Power Transfer

Circuits

Thevenin Equivalent Simulator for maximum power transfer analysis. Simulate load current, voltage, power and efficiency with real-time updates. Thevenin equivalent, impedance matching.

Total Harmonic Distortion (THD) Simulator

Circuits

Total Harmonic Distortion (THD) Simulator: Total harmonic distortion is the single number that measures how far an AC voltage or current waveform departs fro…

BJT Common-Emitter Amplifier Calculator — Operating Point, Gain & Load Line

Circuits

Calculate BJT common-emitter amplifier parameters: DC bias, voltage gain, and load line. Adjust VCC, resistors, and β in real-time.

BJT Transistor DC Bias Design

Circuits

Design BJT transistor DC bias circuits. Calculate Q-point, stability factor, and visualize the DC load line for voltage divider, emitter, and collector feedback bias.

Wheatstone Bridge Simulator — Balance Condition & Sensitivity

Circuits

Wheatstone Bridge Simulator for strain gauges and precision resistance measurement. Explore balance conditions, output voltage, and sensor sensitivity with interactive visualization.

Wien Bridge Oscillator Simulator — Sinusoidal Oscillation Conditions

Circuits

Wien Bridge Oscillator Simulator: Compute f0, feedback ratio, and sustained oscillation conditions (A*beta=1) for sinusoidal generation. Wien bridge, oscillator design.

Y-Delta (Star-Delta) Transform Simulator

Circuits

Convert three resistors between the Y (star) and Δ (delta) arrangements using the Kennelly transform.

Zener Voltage Regulator Simulator

Circuits

Zener Voltage Regulator Simulator: Design the simplest of all voltage regulators — a shunt regulator built from just a series resistor and a zener diode. Adj…