LEDs

Created on November 15, 2024

Updated on November 19, 2024

Tags: electronics, arduino

# Resistors

Which resistor should I use? When in doubt use 220 ohm. Otherwise, these are common resistor values:

LED Color	3.3V	3.7V	5V	6V	9V	12V
AMBER 2.1V, 20mA	68 Ohm	82 Ohm	150 Ohm	220 Ohm	390 Ohm	560 Ohm
BLUE 3.2V, 20mA	5.6 Ohm	27 Ohm	100 Ohm	150 Ohm	330 Ohm	470 Ohm
GREEN 2.1V, 20mA	68 Ohm	82 Ohm	150 Ohm	220 Ohm	390 Ohm	560 Ohm
ORANGE 2V, 20mA	68 Ohm	100 Ohm	180 Ohm	220 Ohm	390 Ohm	560 Ohm
PINK 3.2V, 20mA	5.6 Ohm	27 Ohm	100 Ohm	150 Ohm	330 Ohm	470 Ohm
PURPLE 3.2V, 20mA	5.6 Ohm	27 Ohm	100 Ohm	150 Ohm	330 Ohm	470 Ohm
RED 1.8V, 20mA	82 Ohm	100 Ohm	180 Ohm	220 Ohm	390 Ohm	560 Ohm
WHITE 3.2V, 20mA	5.6 Ohm	27 Ohm	100 Ohm	150 Ohm	330 Ohm	470 Ohm
YELLOW 2V, 20mA	68 Ohm	100 Ohm	180 Ohm	220 Ohm	390 Ohm	560 Ohm