Hi, I've been googling around but I couldn't find a satisfactory answer.... I have 5 LEDs set up in parallel being powered by a 12v/3A regulated supply (eventually to be controlled by an arduino through a TIP120 transistor)...the LEDs have a Vf of 3.5 and draw 35mA...an LED calculator online told …

resistor heat

winner10920 September 30, 2011, 11:16pm 7

You could perhaps find 10w power resistors which are meant to dissapate heat faster

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