AtomSoft
Well-Known Member
Ok i want to power some LEDs, lets say 6 leds
I know that the car outputs 12v from the battery. But i hear that there is a spike from the alternator. I wanted to know whats the best way to power them without using a voltage regulator.
The LED has a 3.4v (VF) drop ... so if i connect 3 in series thats 10.2v ...
12v - 10.2v = 1.8v / 20mA = 90 Ohm Resistor... But what can i use to protect against the spike?
I know that the car outputs 12v from the battery. But i hear that there is a spike from the alternator. I wanted to know whats the best way to power them without using a voltage regulator.
The LED has a 3.4v (VF) drop ... so if i connect 3 in series thats 10.2v ...
12v - 10.2v = 1.8v / 20mA = 90 Ohm Resistor... But what can i use to protect against the spike?