Recebido em 29 de maio de 2016. Revisado em 5 de agosto de 2016. Aceito em 9 de agosto de 2016 O estudo da eletricidade nos cursos de graduação em Física pode ser mais motivador e eficiente se agregar novos desafios, como o uso de circuitos eletrônicos. Neste trabalho, exploramos os recursos eletrônicos do Arduino, de sensores de corrente elétrica baseados em indução eletromagnética, de resistores, de capacitores e de programas de computador. Apresentamos os resultados obtidos e os métodos para visualizar a forma de onda da corrente elétrica de alguns eletrodomésticos e o espectro de frequência destas formas de onda. Palavras-chave: Corrente alternada, Forma de onda, Arduino, Python, transformada discreta de Fourier.The study of electricity in undergraduate programs in physics can be more motivating and efficient if to add new challenges such as the use of electronic circuits. In this paper, we explore the electronic resources of Arduino, electric current sensors based on electromagnetic induction, resistors, capacitors and computer software. We present the results and the methods to display the waveform of the electric current of some home appliances and the spectrum of frequency of these waveforms.
Literatures in the health areas are reported frequently on accidents caused by problems with shock during surgery in both patients as the clinical team. It should be noted that most electrical equipment, during use, is often in contact with the patient and / or with medical professionals. Therefore, the electric shock danger always exists in this environment. To avoid this, some equipment has been identified for monitoring IT-system and the use of these normally required by standards. The research described in this paper presents an electrical safety and information system in a critical environment on the hospital that meets the standard. This system has an insulation monitoring device and annunciator, part of the IT-system, with unpublished characteristics.
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