Esta luz estroboscópica simple es de un artículo nuestro de 1982. Su circuito completo, muy simple, aparece en la figura. En este circuito el oscilador de relajación, con el transistor unijuntura 2N2646, produce los pulsos de la etapa de potencia que lleva un SCR del tipo 106 (MCR 106-4 o MCR106-6). La frecuencia es dada tanto por el capacitor C1 como por la posición del ajuste que es hecho por un pote. Para el paso oscilante con transistores unijuntura el autor del proyecto utilizó una fuente separada que consiste en una batería de 6 V (4 pilas conectadas en serie). Como el consumo de la etapa oscilante es bastante bajo, la durabilidad de las pilas será grande. La etapa de potencia es alimentada por la red local de 110 V o 220 V, pudiendo controlar lámparas de hasta 100 W. Para lámparas de 60 a 100 W será conveniente montar el SCR en un disipador de calor. Para lámparas más pequeñas no será necesario el disipador. Observe que la frecuencia máxima del oscilador está determinada por la inercia de la lámpara común que no puede ir más allá de algunos Hertz.

 


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