| LED Series Resistance
Enter LED Parameters from Datasheet.
The LED forward voltage drop stated in the datasheet:.... is the typical voltage drop.
For a precise series resistor value, the Vfwd of ALL the LED's should be measured.
This is especially important when connecting LED's in series chains.
as the combined spread in the Vfd can lead to an excessive LED current
|Typical Forward LED Voltage Drop [will also calc for +/-10%]:|
|Number of LED's in Series, same type LED's:|
|Required LED Operating current milli-amps:|
|Maximum Permissable LED current Limit milli-amps:|
|Click Calculate to Show Ideal Resistor Value Here:=|
|Possible Current Range:= High, Typical and Low LED current over the Vfwd range.|
|Re-Calculate using a Preferred Resistance Value and the Entered Values:|
|Enter Chosen Preferred Resistor Value [Ohms]:|
|Resistor Wattage Rating:___W||Possible Led Current Range:= High, Typical and Low LED current over the Vfwd range.|