Inputs
R = (Vs - Vf) / I
Current is entered in mA and converted internally to amps.
Tool
LED Resistor Calculator
Use supply voltage, LED forward voltage, and desired current to get a safe resistor value.
Tool
Use supply voltage, LED forward voltage, and desired current to get a safe resistor value.
R = (Vs - Vf) / I
Current is entered in mA and converted internally to amps.