LED resistor calculator
Which resistor for an LED.
How it’s worked out
R = (supply − LED voltage × LEDs) ÷ current. Take the LED’s voltage and current from its datasheet. Pick the nearest resistor you have above this, rated above the power shown.
Which resistor for an LED.
R = (supply − LED voltage × LEDs) ÷ current. Take the LED’s voltage and current from its datasheet. Pick the nearest resistor you have above this, rated above the power shown.