Dispositivo para medir tiempo y temperatura usando un microcontrolador
AUTOR(ES)
Calderón, Germán, Muñoz, José Herman, Rivera, Javier Yovany
FONTE
Rev. Bras. Ensino Fís.
DATA DE PUBLICAÇÃO
27/11/2017
RESUMO
In this paper a device of data acquisition with low cost and easy management was developed for using in experiments of physics where time or temperature measurement is required. The device is composed by three main parts: (i) sensors to measure the physical variables of time and temperature; (ii) a data acquisition card with microcontroller to manage commands and (iii) a computer in order to store data. The sensor, composed by an infrared and a phototransistor, changes its logical state when the signal is interrupted. The board used includes a microcontroller of Microchip brand, PIC18F14K50, which has comparators, analog to digital converters, timers and an Universal Serial Bus (USB) port. The computer was used as a tool to store data and see variables by means of a spreadsheet. The microcontroller programming was made with MPLABX software of free license. The usefulness of the device was tested in the free fall experiment in order to determine the value of the gravitational acceleration.
Documentos Relacionados
- Ampliación del Tiempo y Dispositivo Escolar: oportunidades y resistências
- Usando um voltímetro para medir tempo
- UN NIÑO EN ESTADO DE PAISAJE: ALLÁ LEJOS Y HACE TIEMPO DE GUILLERMO ENRIQUE HUDSON
- Estimación del tiempo de iluminación solar sobre la tierra mediante un modelo analítico: un escenario fértil para enseñar física
- Relatividad y el Espacio-Tiempo: Una introduccion para estudiantes de colegio