Evento: XXVI Seminário de Iniciação Científica DESIGN AND CONSTRUCTION OF A DIFFERENTIAL AMPLIFIER CIRCUIT FOR EDUCATIONAL PURPOSES 1 PROJETO E CONSTRUÇÃO DE UM CIRCUITO AMPLIFICADOR DIFERENCIAL PARA FINS EDUCACIONAIS Edmilton Oliveira Stein 2 , Luis Antonio Rasia 3 , Antonio Carlos Valdiero 4 , Giovani Prates Bisso Dambroz 5 , Mônica Raquel Alves 6 , Carlos Augusto Valdiero 7 1 Research Project carried out at UNIJUÍ’s Mechanical Engineering Course. 2 Mechanical engineering undergraduate student at UNIJUI; E-mail: e_stein@outlook.com 3 Doctor Professor at Technology Department, UNIJUÍ; Leader of the research group "Projeto em Sistemas Mecânicos, Mecatrônica e Robótica"; E-mail: rasia@unijui.edu.br 4 Doctor Professor at Technology Department, UNIJUÍ; Leader of the research group "Projeto em Sistemas Mecânicos, Mecatrônica e Robótica", Advisor; E-mail: valdiero@unijui.edu.br 5 Mechanical engineering undergraduate student at UNIJUI, PIBITI/CNPq scholarship holder; E- mail: giovanipbd@gmail.com 6 Mechanical engineering undergraduate student at UNIJUI, PIBIC/FAPERGS scientific initiation scholarship holder; E-mail: www.monicaalves@hotmail.com 7 Computer science undergraduate student at UNIJUI, PIBIT/UNIJUI scholarship holder; E-mail: carlos_valdiero@hotmail.com INTRODUCTION In the past few years a term has been popular inside the industry, especially because of the current need for qualified workforce, the high demand for personalized products, the need for reducing the energy consumption and the high number of occupational accidents. This term is "Industry 4.0", this designation originally from Germany represents the connection between real and virtual world in order to increase the production allowing it to be more flexible and providing an effective relationship between man and machine. The Advanced Manufacturing consists of collecting data from sensors, processing and then convert them into actions previously programmed. In this new industry age, the sensors play a crucial role getting the information, to further help the system to make the most suitable decision based on its database. However, the sensors generally emit small-signal and in a small range, those which need to be amplified and processed before their use in control systems, so that improving their reliability. Based on this, a cheap and simple signal amplifier circuit was designed and developed aiming to be used to supply the needs of the NIMASS, from Portuguese "Núcleo de Inovação em Máquinas Automáticas e Servo-Sistemas" located in Panambi town, and also for educational purposes in the University’s electronic classes.