⚡ RC Circuit Simulator
MATLAB • App Designer • Engineering Simulation

RC Circuit
Transient Response Simulator

Interactive MATLAB App Designer Engineering Simulation

Model and visualize capacitor charging and discharging behavior in a first-order RC circuit. Calculate the time constant, analyze transient response, and export data for engineering analysis.

◢ MATLAB▣ App Designer↗ Data Visualization▤ CSV Export
View ApplicationView Results View GitHub
MATLAB App Designer RC circuit interface
◷

Time Constant

τ = RC

The time constant determines how quickly the capacitor charges or discharges.

▣

Charging Response

Exponential Rise

Capacitor voltage rises exponentially toward the input voltage.

⇄

Discharging Response

Exponential Decay

Capacitor voltage decays exponentially toward zero.

▥

Data Export

CSV Output

Simulation data can be exported for Excel or MATLAB analysis.

1. RC Circuit Model
RC circuit schematic
Vin = Input DC VoltageVout = Capacitor VoltageR = Resistance (Ω)i(t) = CurrentC = Capacitance (F)τ = RC Time Constant
2. Mathematical Model

VC(t) = V0(1 − e−t/RC)

VC(t) = V0e−t/RC

τ = RC

At t = τ, the capacitor reaches 63.2% of its final charging voltage.
3. Simulation Workflow
⌨ User InputsR, C, V₀, Time
↓
↻ MATLAB SimulationApply RC equations
↓
ƒx Plot ResultsVoltage vs. Time
↓
▨ Export DataCSV for analysis
4. MATLAB App Interface
MATLAB RC circuit simulator application

Interactive App Designer interface for running simulations and visualizing results.

5. Simulation Results

● RC time constant calculated

● Charging and discharging curves generated

● 63.2% voltage marker at t = τ

● Data exported to CSV for analysis

Simulation Output

Charging and Discharging Response

RC charging and discharging plot

Engineering Interpretation

The charging curve approaches the supply voltage while the discharging curve returns toward zero. The time constant marks the first-order response speed.

63.2%Voltage at one τ
5τApprox. full response
CSVExport-ready data
6. MATLAB Code Highlights
1 tau = R * C;
2 t = 0:dt:t_end;
3
4 Vc_charge = V0 * (1 - exp(-t / tau));
5 Vc_discharge = V0 * exp(-t / tau);
6 plot(t, Vc_charge, 'b', t, Vc_discharge, 'r--');
7 yline(0.632*V0, 'g--', '63.2% (τ)');
7. Engineering Skills Demonstrated
MATLABApp DesignerCircuit AnalysisEngineering SimulationData VisualizationMathematical ModelingCSV ExportTechnical Documentation
8. Future Enhancements

→ Add interactive sliders for real-time parameter adjustment

→ Implement frequency response analysis and Bode plots

→ Develop a Simulink model for system-level simulation

→ Automate report generation with figures and tables

→ Support multiple capacitor configurations and topologies