CURRENT LIMITING RESISTOR CALCULATOR

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FOR LUXEON STAR AND UFO LED'S

  The calculators on this page can be used to find current limiting resistors and currents for LUXEON STAR and UFO LED'S

  The first calculator determines the resistance for a desired LED current while the second calculates the current for a given resistance.


LED - Current and Resistance Calculator Diagram

LED - CURRENT LIMITING RESISTOR CALCULATOR

Supply Voltage

VOLTS
Voltage Drop Across LED

VOLTS
Desired LED Current

MILLIAMPS
Calculated Limiting Resistor

OHMS
Calculated Resistor Wattage

WATTS

LED - CURRENT CALCULATOR

Supply Voltage

VOLTS
Voltage Drop Across LED

VOLTS
Resistor Value

OHMS
Calculated LED Current

MILLIAMPS
Calculated Resistor Wattage

WATTS

Voltages in Volts - Current in Milliamps - Resistance in Ohms

When selecting resistors - It is advisable to choose the next higher standard value.

  If LED's are connected in series - ADD their voltage drops together to get the total voltage drop.

If LED's are connected in parallel - ADD their current ratings together to get the total Desired Led Current

  Entering a zero for the LED voltage drop will yield the resistance and wattage for a resistance only circuit.

Brought to you courtesy of Quickar Electronics, Inc.