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TOOLS > LED Series Resistor Calculator
LED Series Resistor Calculator

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. Note: When you select a resistor for this purpose, choose a device with a power rating between 2 and 10 times the value calculated below in order to avoid excessive resistor temperatures.

Supply Voltage

V

Forward Voltage

V

Forward Current

mA

Resistor Value

{{ resistance }}

Power

{{ power }}
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