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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.
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.
LEDs are usually operated via a series resistor. The series resistor must be dimensioned in such a way that the supply voltage and the maximum permissible current are not exceeded. You can calculate the size of the resistor on this page.
This LED calculator will help you calculate the resistor values you will need when designing a series/parallel LED array circuit.
Use this tool to calculate the resistance required to drive one or more series-connected LEDs from a voltage source at a specified current level.
LED Series Resistor Calculator. An LED series resistor limits the amount of current that passes through the LED and shields it from harm caused by an excessive amount of current by connecting a resistor in series with the LED.
