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Martins, J. E. M. Perea – Physics Education, 2020
This work presents a sequence to introduce resistive gas sensors in the classroom. It explains the physical principle of the metal oxide semiconductor sensors and exemplifies its real interfacing through the sensor model MQ-2. Besides, it also presents the design of two electronic systems to indicate the level of alcohol concentration in the air,…
Descriptors: Physics, Science Instruction, Teaching Methods, Electronic Equipment