Quote:
Originally Posted by Leonardo
I don't have an issue. OP, does. I was just saying that if our cars have the wrong resistance for the lighting; it can blow fuses. And that the ohm load of an incandescent bulb is much higher than an efficient LED. (or group of LEDs in series)
You can direct hook 4 three volt LEDs in series to a 12v circuit. But, the voltage to our cars jumps to 14.5v when the car is started. Thus the need for a resistor, so as not to overdrive the (small) LEDs I am using. I 'm using 18 5mm LEDs in a series / parallel configuration with a resistor in one location. I have different configurations in different locations.
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My bad got my OP crossed.
99% of the time when people talk about installing LED they are buying lamp replacements with the voltage regulator build into the base. Not like you that purchased raw LED’s and yes needing to control the voltage to them with a dropping resistor or regulator.