Abstract
This article presents the development and construction of a didactic kit of practical experiences of electrical circuits, remotely controllable through the internet, from low cost resources and devices, and easy to implement. Developed with open source technologies, the practice module was built from a Raspberry Pi, and subdivided into four parts: a web application (developed in Html, Css, Javascript, PHP and MySQL) and a local application coded in Python and runs on the Raspberry; two electronic boards, one for controlling the resistors of a circuit and the other as a variable power supply for the circuit; a cabinet designed and built in MDF to accommodate all the physical components of the equipment; and a mixed electrical circuit for experiments, consisting of 9 resistors, 10 voltmeters and 3 ammeters. To access remotely, a Login system was built, generating greater security and a button interface that, when triggered, make requests to a server, recording the status of the button pressed in an SQL Database (Structured Query Language). Tests were carried out to check the integrity of the hardware and software devices of the didactic kit, considering that they did not present any flaws, allowing the equipment to be installed in a physics laboratory, connected to the internet and made available intermittently for use by high school students.
Highlights
The use of practical experiments combined with technologies in the teaching of physics are extremely important for students' learning, and for this to exist, it is essential that the teacher has some tools to promote the student's interest in the studied subject, such as what will be developed in this project, the so-called virtual laboratories, being necessary so that the students get motivated during the classes (Tironi et al, 2013).It becomes a great challenge for educators from all areas of knowledge to promote teaching practices so that the student has a meaningful learning of the subjects studied, and not learning in a mechanical way (Sim & Monteiro, 2018)
Developed with open source technologies, the practice module was built from a Raspberry Pi, and subdivided into four parts: a web application and a local application coded in Python and runs on the Raspberry; two electronic boards, one for controlling the resistors of a circuit and the other as a variable power supply for the circuit; a cabinet designed and built in MDF to accommodate all the physical components of the equipment; and a mixed electrical circuit for experiments, consisting of 9 resistors, 10 voltmeters and 3 ammeters
Tests were carried out to check the integrity of the hardware and software devices of the didactic kit, considering that they did not present any flaws, allowing the equipment to be installed in a physics laboratory, connected to the internet and made available intermittently for use by high school students
Summary
The use of practical experiments combined with technologies in the teaching of physics are extremely important for students' learning, and for this to exist, it is essential that the teacher has some tools to promote the student's interest in the studied subject, such as what will be developed in this project, the so-called virtual laboratories, being necessary so that the students get motivated during the classes (Tironi et al, 2013) It becomes a great challenge for educators from all areas of knowledge to promote teaching practices so that the student has a meaningful learning of the subjects studied, and not learning in a mechanical way (Sim & Monteiro, 2018). The lack of resources and space to have a available laboratory are barriers found by several schools, mainly in high school, where this project will be applied (Tironi et al, 2013; Sim & Monteiro, 2018; Neves, Caballero & Moreira, 2006).
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