Resistor Calculator
If you don't have a calculator handy, use this JavaScript resistor 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
=
