Source Voltage 
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LED Forward Voltage Drop 
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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 
= 
