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What resistor for LED (advanced calculator)

What resistor for LED (advanced calculator)

Inputs

Supply voltage
Vs
V
Supply voltage max
Vsmax
V
Conductive voltage
Vd
V
Number of LEDs in series
N
Maximum current
ID max
mA
RS = ( VS max - (VD * N)) / ID max
ID = (VS - (VD * N)) / RS
PRS = (ID max) 2 * RS

Outputs

Rs: 

ID: 

PRs: 

Resistor for LED Calculators