Estimation of Planck's constant using light-emitting diodes and microcontrollers

 In this work, we estimate the Plank constant by measuring the characteristic I-V curves of light-emitting diodes (LEDs). To do this, we use a microcontroller, a simple low-pass filter to filter out high frequencies, a curve smoothing method, and an average of repetitions to eliminate imper...

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Autores principales:	Basualdo, Lautaro E., Candia, Miguel A., Gester, Rodrigo M., Fernandez, Lucas J., Provasi, Patricio F.
Formato:	Artículo revista
Lenguaje:	Español
Publicado:	Facultad de Ciencias Exactas y Naturales y Agrimensura - Universidad Nacional del Nordeste 2024
Materias:	software smoothing Characteristic curve of LEDs Microcontrollers PWM and automation Software smoothing Curva característica de LEDs Microcontroladores PWM y automatización Suavización por software
Acceso en línea:	https://revistas.unne.edu.ar/index.php/eitt/article/view/7657
Aporte de:	Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste

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spelling	I48-R154-article-76572025-08-08T16:38:45Z Estimation of Planck's constant using light-emitting diodes and microcontrollers Estimation of Planck's constant using light-emitting diodes and microcontrollers Basualdo, Lautaro E. Candia, Miguel A. Gester, Rodrigo M. Fernandez, Lucas J. Provasi, Patricio F. software smoothing Characteristic curve of LEDs Microcontrollers PWM and automation Software smoothing Curva característica de LEDs Microcontroladores PWM y automatización Suavización por software  In this work, we estimate the Plank constant by measuring the characteristic I-V curves of light-emitting diodes (LEDs). To do this, we use a microcontroller, a simple low-pass filter to filter out high frequencies, a curve smoothing method, and an average of repetitions to eliminate imperfections in the voltage delivered by the port of pulse width modulation (PWM) used as a variable voltage source. The measurement of the diode voltages was carried out using the microcontroller’s analog pin. Automating the two tasks allowed us to obtain the diode's characteristic curve and the threshold voltage (V0). Using the V0 values and the emission peak of 4 LEDs, Planck's constant was determined with a relative percentage error of 2%. En este trabajo estimamos la constante de Plank midiendo las curva I-V característica de los diodos emisores de luz (LEDs). Para ello utilizamos un microcontrolador, un filtro simple, pasa-baja, de forma de filtrar las frecuencias altas, un método de suavizado de curvas y un promedio de un set de repeticiones para eliminar las imperfecciones en el voltaje entregado por el puerto de modulacion de ancho de pulso (PWM) utilizado como fuente de tensión variable. La medicion de las tensiones del diodo se realizó mediante los pines analógicos del microcontrolador. La automatización de las dos tareas permitió obtener la curva característica del diodo y el voltaje de umbral (V0). Utilizando los valores de V0 y el pico de emisión de 4 LEDs, se determinó la constante de Planck con un error relativo porcentual del 2%.  Facultad de Ciencias Exactas y Naturales y Agrimensura - Universidad Nacional del Nordeste 2024-12-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unne.edu.ar/index.php/eitt/article/view/7657 10.30972/eitt.927657 Extensionismo, Innovación y Transferencia Tecnológica; Vol. 9 Núm. 2 (2024); 5-17 2422-6424 spa https://revistas.unne.edu.ar/index.php/eitt/article/view/7657/8064 Derechos de autor 2024 Lautaro E. Basualdo, Miguel A. Candia, Rodrigo M. Gester, Lucas J. Fernandez; Patricio F. Provasi http://creativecommons.org/licenses/by/4.0
institution	Universidad Nacional del Nordeste
institution_str	I-48
repository_str	R-154
container_title_str	Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language	Español
format	Artículo revista
topic	software smoothing Characteristic curve of LEDs Microcontrollers PWM and automation Software smoothing Curva característica de LEDs Microcontroladores PWM y automatización Suavización por software
spellingShingle	software smoothing Characteristic curve of LEDs Microcontrollers PWM and automation Software smoothing Curva característica de LEDs Microcontroladores PWM y automatización Suavización por software Basualdo, Lautaro E. Candia, Miguel A. Gester, Rodrigo M. Fernandez, Lucas J. Provasi, Patricio F. Estimation of Planck's constant using light-emitting diodes and microcontrollers
topic_facet	software smoothing Characteristic curve of LEDs Microcontrollers PWM and automation Software smoothing Curva característica de LEDs Microcontroladores PWM y automatización Suavización por software
author	Basualdo, Lautaro E. Candia, Miguel A. Gester, Rodrigo M. Fernandez, Lucas J. Provasi, Patricio F.
author_facet	Basualdo, Lautaro E. Candia, Miguel A. Gester, Rodrigo M. Fernandez, Lucas J. Provasi, Patricio F.
author_sort	Basualdo, Lautaro E.
title	Estimation of Planck's constant using light-emitting diodes and microcontrollers
title_short	Estimation of Planck's constant using light-emitting diodes and microcontrollers
title_full	Estimation of Planck's constant using light-emitting diodes and microcontrollers
title_fullStr	Estimation of Planck's constant using light-emitting diodes and microcontrollers
title_full_unstemmed	Estimation of Planck's constant using light-emitting diodes and microcontrollers
title_sort	estimation of planck's constant using light-emitting diodes and microcontrollers
description	In this work, we estimate the Plank constant by measuring the characteristic I-V curves of light-emitting diodes (LEDs). To do this, we use a microcontroller, a simple low-pass filter to filter out high frequencies, a curve smoothing method, and an average of repetitions to eliminate imperfections in the voltage delivered by the port of pulse width modulation (PWM) used as a variable voltage source. The measurement of the diode voltages was carried out using the microcontroller’s analog pin. Automating the two tasks allowed us to obtain the diode's characteristic curve and the threshold voltage (V0). Using the V0 values and the emission peak of 4 LEDs, Planck's constant was determined with a relative percentage error of 2%.
publisher	Facultad de Ciencias Exactas y Naturales y Agrimensura - Universidad Nacional del Nordeste
publishDate	2024
url	https://revistas.unne.edu.ar/index.php/eitt/article/view/7657
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first_indexed	2025-08-17T05:01:42Z
last_indexed	2025-08-17T05:01:42Z
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Estimation of Planck's constant using light-emitting diodes and microcontrollers

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