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VARIABLE RESISTORS - Contenido educativo

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Subido el 21 de abril de 2023 por Beatriz T.

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POTENTIOMETERS, LDR AND THERMISTORS

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Variable resistors. 00:00:00
Some circuits require a variable resistance rather than a fixed one. 00:00:02
This could be to adjust the current in the circuit or to detect changes in light or temperature. 00:00:07
In these cases, we use 00:00:13
Variable resistors or potentiometers. 00:00:22
The maximum value of the component will be indicated on it. 00:00:26
For example, 1 Kiloohms, 10 Kiloohms, 100 Kiloohms, etc. 00:00:29
The higher is the resistance, the lower is the intensity. 00:00:35
Light-controlled variable resistors or LDR, light-dependent resistors. 00:00:50
When we increase the intensity of the light that shines on it, the resistance value decreases, i.e. the more light there is, the less resistance we have. 00:00:55
This way, it can detect changes in light and stop the flow of the current in darkness. 00:01:05
Temperature-controlled variable resistors or thermistors, thermally sensitive resistors. 00:01:18
These can be NTC, negative temperature coefficient, or PTC, positive temperature coefficient, depending on whether their resistance decreases or increases as the temperature rises. 00:01:24
Thank you for watching. 00:01:54
Autor/es:
BEATRIZ TORREJÓN TEVAR
Subido por:
Beatriz T.
Licencia:
Reconocimiento - No comercial
Visualizaciones:
28
Fecha:
21 de abril de 2023 - 8:33
Visibilidad:
Público
Centro:
IES CERVANTES
Duración:
01′ 59″
Relación de aspecto:
1.78:1
Resolución:
1280x720 píxeles
Tamaño:
8.32 MBytes

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