Introduction

About

CircuitS is a library written in Julia programming language for solving linear, time-invariant electric circuits. Using JuliaSymbolics library as a computer algebra system and for solving linear equations, CircuitS successfully simulates and solves simple electric circuits.

Why CircuitS?

• Written in a high-level, high-performance, dynamic programming language
• Open-source code licensed under GPLv3
• GUI Extension that offers a user-friendly way to create and modify circuits
• Completely modular code. Ability to include it in other projects easily
• Large set of examples and video explanations

Algorithm

CircuitS uses modified nodal analysis to solve electric circuits. MNA is an extension of nodal analysis which not only determines the circuit's node voltages (as in classical nodal analysis), but also some branch currents. Modified nodal analysis was developed as a formalism to mitigate the difficulty of representing voltage-defined components in nodal analysis (e.g., voltage-controlled voltage sources).

Limits

Julia, as a relatively new language, offers modern and efficient solutions to classic programming problems, but it does come at a cost. Lack of testing and support for its symbolic library is reflected in this project and will be discussed further in detail.

Authors

• Stevo Mitrić
• Filip Drobnjaković

University of Belgrade, School of Electrical Engineering

Acknowledgment

We thank Prof. dr Dejan V. Tošić and Prof. dr Milka M. Potrebić for recommending this software project to us and for all discussions and help with the project.