ComplexCircuitSolver

Complex Circuit Solver is a Python program to solve Complex Circuits with Resistors with Logical Reasoning. It uses a Component Tree structure with Recursive Solving to determine the voltages, currents, and resistances for any complex circuit.

If you would like to try this solver online, check out https://circuitcracker.vercel.app/ and https://github.com/Saptak625/CircuitCracker.

User Guide

In the current version (V1), circuits are represented in .crc circuit code file. An example circuit is shown below.

ComplexCircuitSolver/template_circuit.crc

Lines 1 to 15 in a2d3065

	R1 13.5_V
	R2 250_O
	R3 0.0075_A
	R4 7.5_V
	R5 600_O
	R6 0.005_A
	R7 300_O
	R8 0.005_A
	L4 S R2,R3,
	L5 S R7,R8,
	L1 S R1,
	L2 P L4,R4,
	L3 P R5,R6,L5,
	LT S 0.015_A L1,L2,L3,
	PASS LT

These files are compiled line by line by a custom compiler to create a Component Tree structure. The code in main.py will compile the given file when the CiruitSolver class is instantiated.

ComplexCircuitSolver/main.py

Lines 1 to 8 in a2d3065

	from circuit_solver import CircuitSolver
	circuitSolver = CircuitSolver.compileCircuitFromFile('circuit.crc')
	circuitSolver.setRoundingPlace(5)
	circuitSolver.solve()
	circuitSolver.showStepByStepReasoning(showVoltageSteps=True, showCurrentSteps=True, showResistanceSteps=True)
	print('\n\n')
	circuitSolver.showCircuit(showVoltage=True, showCurrent=True, showResistance=True, showLegs=True, showResistors=True)

Commands

R

The "R" command is used to define a new resistor. The resistor requires only 2 parameters, but can take up to 4 parameters. Every resistor needs to have a name/label. This distinguishes each resistor. If 2 resistors are defined with the same name, the latest one will overwrite the previous one. The name directly follows the "R" command. You can make the name as long as you would like as long as it has no newline characters, spaces, underscores, or commas. Usually, however, a simple number will suffice. The other three paramaters are for voltage, current, and resistance. At least one of these parameters must be provided in order for the resistor to not be ambigious. All three parameters can be provided, but if these parameters don't agree, algorithm will not function properly. These three parameters must be provided after the name followed by a space. You must provide the according units for these parameters namely _V for voltage, _A for current, and _O for resistance.

Eg. R1 250_O, RMIDDLE 5_V 200_O, R5 10_V 0.01_A 0.1_O

L

The "L" command is used to define legs. Legs are like "abstract" resistors. This is because any complex circuit can be simplified into a single resistor. As a result, legs act as containers for resistors and other legs. Legs accept all the same parameters as a resistor, but also require 2 more parameters. First, a Leg must be defined as Series(S) or Parallel(P). Second, the names of the subcomponents of a leg needed to listed seperated by commas including an extra comma at the very end. A leg must have at least one subcomponent. With only one subcomponent, leg can be either defined as series or parallel. Finally, once again, if overdefining a leg, ensure that it is accurate, otherwise algorithm will not function properly.

Eg. L1 S 9_V L1,R2,R3,, LTOTAL P 3_V 1000_O R1,

PASS

Every circuit code file needs to have a PASS statement. This statement signifies what the root component of the tree is. Root component could be either a single resistor or a leg, which could contain multiple resitors. The PASS statement only requires one parameter, which is simply the name of the root component.

Eg. PASS LT

Future Plans

• The integration of a GUI into Circuit Code has the potential to greatly enhance the design process for electrical circuits. With a graphical interface, designing circuits may become easier and more intuitive for users, reducing the need for manual coding and allowing for a more user-friendly experience. The automatic definition of legs may also simplify the process of defining and organizing components in a circuit.
• Furthermore, the expansion of Circuit Code to include other electrical components such as capacitors and inductors may bring more versatility and accuracy to the simulation of electrical circuits. This would allow for the simulation of a wider range of circuits and increase the overall usefulness of Circuit Code. Additionally, the ability to simulate these components may lead to improved circuit design and optimization, resulting in better performance and functionality in real-world applications.