Circuit Solver

The Circuit Solver analyses circuits from a diagram or a description. Series and parallel reduction with the equivalent resistance at each stage. Ohm's law and power in each element. Kirchhoff's current and voltage laws with the node or loop equations written out and solved. Voltage and current dividers. Thevenin and Norton equivalents. Superposition. Capacitor and inductor networks. RC and RL transients with the time constant and the exponential solution. AC circuits with impedance, phasors, resonance, and power factor. Ideal op-amp configurations. Power dissipation and energy in each element, the effect of an open or short, and simple diode or transistor bias calculations are handled when the problem gives the model to use.

Photograph the circuit diagram with component values visible. That is the best input. Or describe it: "12 V source, 4 ohm in series with a parallel pair of 6 ohm and 3 ohm, find the current through each resistor". Name the quantities you need. Say "nodal" or "mesh" if the course requires a method. Set Answer form to decimal for numeric values or both to keep symbolic expressions. For an AC problem, give the source frequency or angular frequency and the component values; state whether you want the answer as a phasor or as a time-domain expression. For a transient, say what the switch does and at what time, and whether the capacitor starts charged.

Output: the requested currents, voltages, or equivalent values first, in a table when there are several. Then the reduction or the system of equations, each equation tied to a node or loop, the solution, and a power check where relevant. Transient problems show the differential equation and its solution. The working is shown so you can check it. For the matrix algebra in a large nodal system, the Matrix Calculator shows the row reduction. For fields, charges, and magnetism, use the Physics Solver. A follow-up can ask for the circuit re-solved by the other method as a check, for the power balance in every element, or for the equivalent seen from a different pair of terminals. Each equation is tied to a labeled node or loop, so it can be matched to your own diagram.