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Advanced Thevenin Equivalent Circuit Calculator

Build custom circuits with multiple resistors and analyze using Thevenin's theorem. Real-time calculations and dynamic circuit visualization for any configuration.
Dynamic Builder
Standard Circuits
Step Analysis
Examples

Dynamic Thevenin Circuit Builder

Dynamic Thevenin Analysis:
Build custom circuits with multiple resistors in various topologies Vth = Open circuit voltage between terminals A-B Rth = Equivalent resistance with sources deactivated
Voltage Divider
Bridge Circuit
Ladder Network
Parallel Branches
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Circuit Topology

Series
Parallel
Mixed

Circuit Resistors

Add resistors and configure your circuit to calculate Thevenin equivalent.

Standard Thevenin Circuits

Standard Circuit Analysis:
Pre-configured circuits for common Thevenin analysis scenarios Quick calculations for voltage dividers, bridge circuits, and complex networks
Basic Divider
Wheatstone Bridge
T-Network
Pi-Network
Select a circuit type and enter values to calculate Thevenin equivalent.

Step-by-Step Thevenin Analysis

Thevenin Theorem Steps

1

Identify Load Terminals

Identify the load or the branch across which you want to find the Thevenin equivalent. Mark terminals A and B.

2

Remove the Load

Disconnect the load, leaving terminals A and B open-circuited for voltage calculation.

3

Calculate Thevenin Voltage

Find the open-circuit voltage across terminals A and B using circuit analysis techniques.

Vth = Voc (open-circuit voltage)
4

Calculate Thevenin Resistance

Deactivate all sources and calculate equivalent resistance between terminals A and B.

Rth = Req (equivalent resistance)
5

Draw Equivalent Circuit

Create the Thevenin equivalent with Vth and Rth in series.

Thevenin Calculator Examples

Advanced Thevenin Examples

Multi-Resistor Series Circuit

Configuration: 5 resistors in series with voltage source

  • Vs = 24V, R₁ = 1kΩ, R₂ = 2.2kΩ, R₃ = 3.3kΩ, R₄ = 4.7kΩ, R₅ = 6.8kΩ
  • Vth = Voltage across selected terminals using voltage division
  • Rth = Series combination of relevant resistors
  • Use Case: LED driver circuits, sensor bias networks

Complex Parallel Network

Configuration: Multiple parallel branches with series elements

  • Dynamic resistor addition allows modeling of real-world circuits
  • Automatic calculation of parallel combinations
  • Real-time Thevenin parameter updates
  • Applications: Power distribution, amplifier input/output stages

Mixed Topology Analysis

Features: Combination of series and parallel elements

  • Interactive circuit building with real-time visualization
  • Automatic topology detection and calculation optimization
  • Support for complex impedance networks
  • Benefits: Rapid prototyping, educational demonstrations

Calculator Features

  • Dynamic Resistor Management: Add/remove unlimited resistors
  • Multiple Topologies: Series, parallel, and mixed configurations
  • Real-time Updates: Instant calculations as you type
  • Visual Feedback: SVG circuit diagrams with calculated values
  • Load Analysis: Complete current, voltage, and power calculations
  • Responsive Design: Works perfectly on all devices
  • Export Results: Copy calculations for documentation