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LED Resistor Calculator — Free Online Tool
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LED Resistor Calculator

Calculate series resistor value and power dissipation for an LED circuit

Instructions: Enter the DC supply voltage ($V_s$), LED forward voltage ($V_f$), and LED operating current ($I$) to compute the required series resistance and power rating.
Circuit Parameters

Calculation Results

⚠️ For electronics and physics education reference only. Supply voltage must be greater than LED forward voltage.

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