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This LED calculator will help you calculate the resistor values you will need when designing a series/parallel LED array circuit.
Calculate resistor values for LEDs using this simple calculator. Enter any three known values and press Calculate to solve for the others.
DigiKey's LED series resistor calculator uses supply voltage, forward voltage, and forward current values to help you identify the correct series resistor.
This calculator will help you determine the value of the resistor to add in series with the LEDs to limit the current. Just input the indicated values and press the "Calculate" button. As a bonus, it will also calculate the power consumed by each LED.
Calculate the resistor to use in a circuit with an LED by entering the supply voltage, forward voltage, and forward current below. Optionally calculate the resistor to accommodate multiple LEDs connected in series.
Welcome to the LED Resistor Calculator, where we illuminate the path to choosing the perfect resistor for your LEDs. We promise, no light bulb moments needed! Table of Contents. Categories of LED Resistors. LED Resistor Calculation Methods. Evolution of LED Resistor Calculation. Limitations of LED Resistor Calculation Accuracy.
With this online tool, you can easily calculate the current-limiting resistor for one or more LEDs, both in series and in parallel. Simply input the number of LEDs, the supply voltage, LED forward voltage, and LED current.
