Mantener encendida por un tiempo fijo una lámpara incandescente después de que se presione S1. No utilice con otro tipo de lámpara.

   El circuito puede operar tanto en la red de 110 V como 220 V con lámparas de hasta 100 W.

   El circuito es de media onda, es decir, la lámpara se enciende con la mitad del brillo normal.

   En la figura 1 tenemos el circuito completo de la luz de tiempo. El intervalo máximo es del orden de unos minutos y depende de C1.

 


| Haga click en la imagen para ampliar |

 

 

Utilidades:

• Encendido de luces de pasillo y salones de ascensor

• Accionamiento temporal de cargas diversas como ventiladores y elementos de calefacción.

• Temporización de automatismos industriales en los que no se necesita gran precisión.

    

Detalles constructivos:

   La placa de circuito impreso para el montaje de la luz de tiempo se muestra en la figura 2.

 


| Haga click en la imagen para ampliar |

 

 

   El capacitor C1 es un electrolítico de alta tensión, para 200 V si la red es de 110 V y 400 V si la red es de 220 V.

   El SCR debe montarse en un radiador de calor. Los valores entre paréntesis son para la red de 220 V.

   La carga debe ser obligatoriamente resistiva y el control es de media onda.

 

Semiconductores:

SCR - TIC106B o D - SCR a 110 V o 220 V, según la red local

D1 - 1N4004 (110 V) o 1N4007 (220 V) - diodo de silicio

 

Resistores: (1/8 W, 5%)

R1 - 100 k ohms

R2 - 47 k ohms

 

Capacitor:

C1 - 2 uF a 16 uF x 200 o 400 V - electrolítico de alta tensión - ver el texto

 

Varios:

X1 - Lámpara incandescente de hasta 100 W

Placa de circuito impreso, radiador de calor para el SCR, hilos, soldadura, etc.

 

 

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