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EZFreeTools › Calculators › LED Resistor Calculator

LED Resistor Calculator

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Find the right resistor for your LED.

How to Use

  • Pick an LED color preset or enter the forward voltage manually.
  • Enter the source voltage of your circuit (e.g. 5V for USB, 12V for automotive).
  • Adjust the LED current if your LED differs from the standard 20 mA.
  • Use the nearest standard resistor value shown.

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