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LED Resistor Help Required Please

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ripsnort:

hi,

   Thanks  gave that one a go and it too recomends 18 ohm, i think whats putting me off is that i have not seen any other super bright led with a forward voltage of 4.5 it seems a bit optimistic evey other site and led i have looked at claim about 3/3.5 if this is then entered in the converter it almost triples the value of the resistor whish takes me back to the whole dilema again, gunna try test the volage and failing that will try resistor around 50 ohm and see how we go. I just dont trust the figures i have been given, I suppose if i pop a few its not he end of the world.



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