xtc Posted October 23, 2010 Report Share Posted October 23, 2010 (edited) Amigos, necesito su ayuda, necesito bajar de 20 volt a 12 volt para conectar un parlante, el transformador es de 20V 3.5 A y el parlante es de 12V 1A, se que lo puedo bajar con resistencias, pero como la calculo? De ante mano gracias. Edited October 23, 2010 by xtc Link to comment Share on other sites More sharing options...
Voltairus Posted October 23, 2010 Report Share Posted October 23, 2010 Hola. Si el parlante es de 1A, entonces: Corriente total = 1A Caída de tensión de la resistencia = 8V Ley de Ohm: R = V/I R= 8/1 R = 8 Ohm Y la potencia: P = V*I P = 8Watt Si, es mucha potencia... es que la tensión que deseas bajar es bastante. Espero que confirmes si te ha servido, cosa que espero sea así :) Saludos! Link to comment Share on other sites More sharing options...
xtc Posted October 23, 2010 Author Report Share Posted October 23, 2010 gracias, eso era todo lo q necesitaba Link to comment Share on other sites More sharing options...
Voltairus Posted October 23, 2010 Report Share Posted October 23, 2010 Movido a Temas Resueltos. Saludos! Link to comment Share on other sites More sharing options...
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