Balkan Journal of Electrical and Computer Engineering 2147-284X 2147-284X MUSA YILMAZ 10.17694/bajece.624645 Electrical Engineering Elektrik Mühendisliği Implementation of a Microcontroller-Based Chaotic Circuit of Lorenz Equations https://orcid.org/0000-0002-6211-3751 Yener Şuayb Çağrı SAKARYA UNIVERSITY https://orcid.org/0000-0003-0030-7136 Mutlu Reşat NAMIK KEMAL UNIVERSITY https://orcid.org/0000-0001-5937-2114 Karakulak Ertuğrul NAMIK KEMAL UNIVERSITY 10 30 2020 8 4 355 360 09 25 2019 09 03 2020 Copyright © 2013, Balkan Journal of Electrical and Computer Engineering 2013 Balkan Journal of Electrical and Computer Engineering

Lorenz equations are commonly used in chaoseducation and studies. Simulation programs can be used to produce solutions ofLorenz equations and to examine its chaotic waveforms. However, sometimes achaotic signal source can be needed. Such a circuit can be made using eitheranalog or digital circuit components. Recently, a microcontroller-based circuitis suggested to obtain chaotic waveforms of Lorenz equations however onlysimulations are used to show proof of concept. Such circuit needs experimentalverification. In this paper, implementation and experimental verification ofthe microcontroller-based circuit which solves Lorenz equations in real timeand produces its chaotic waveforms are presented. Runge-Kutta method is used tosolve the equation system. By using Proteus, microcontroller-based chaoticcircuit is simulated and designed. Presented design has been implemented usingan Arduino Mega 2560 R3 microcontroller. The microcontroller sends the chaotic signalsto the outputs of the circuit using digital-to-analog converters. The waveformsacquired experimentally from the implemented circuit matches well with thoseobtained from Proteus simulations.

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