LED resistor value calculator
Resources > LED resistor value calculator
LED type:
LED brightness (at typical current): mCd
LED forward voltage: V
Max LED current: mA
Typical LED current: mA
Battery voltage: V
Number of parallel LEDs:
Calculated resistance: Ohms
Preferred value: Ohms
Resistor colour bands:

Instructions

  1. Select an LED from the "LED type" drop down menu.
  2. Click the "Get LED details" button.
  3. If required, adjust the Typical LED current.
  4. If using more than 1 LED in parallel, change the number of LEDs.
  5. Enter the battery voltage.
  6. Click the "Calculate resistor" button.

led_resistor_circuit.jpg

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