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Resistance Calculator

 

If you don't have a calculator nearby, use this resistance calculator to do the math.

Source Voltage =
LED Forward Voltage Drop =
LED Forward Current in Milliamps =
Needed Resistance in Ohms =
Using Closest Standard 5% Resistor
Closest Standard 5% Resistor =

Closest Standard 5% Resistor Wattage =
Actual Current =
Actual Power Dissipated By LED =


Actual Power Dissipated By Resistor

=

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