El circuito que damos es un circuito que usa un diodo 1N4148 común como sensor para controlar la temperatura de un componente o cualquier lugar que esté sujeto a un aumento excesivo de temperatura. Este circuito, que se muestra en la figura, enciende un motor de ventilador que arranca cuando la temperatura excede un valor que se establecerá en P1. La sensibilidad será mayor cuanto mayor sea el valor que se puede ajustar en P1 para obtener el umbral de activación. Los trimmers de 470 k ohm son los más pequeños recomendados para aplicaciones con un transistor, pero los mejores son 2 M ohms e incluso 4,7 M ohms, cuando se obtiene la máxima sensibilidad. Podemos citar como ejemplo de aplicación de este circuito un sistema de ventilación forzada para un amplificador de audio que tiene transistores de potencia montados en un disipador térmico

 

Control de ventilador I
Control de ventilador I

 

 

 

18.841MBMemory Usage36.94msRequest Duration
Joomla! Version5.2.3
PHP Version8.3.20
Identityguest
Response200
Templatecassiopeia
Database
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Collation
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Conn Collation
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