LED Series Resistor Calculator

In any simple electronic circuit where a LED is involved, that is while driving an LED light, or a LED series, it is required to limit the current flowing through it. Connecting a LED directly to the power supply will burn out the LEDs. Use our online LED series resistor calculator to calculate the resistance required to safely operate the LED series. Determine the series resistor needed to connect various series combinations of light emitting diodes.

V
V

Result :

Ohms
In this LED Series resistance calculator, enter the values for supply voltage Vs, voltage drop Vd and forward current If. This calculator helps you identify what is the optimum amount of current to be passed through the LED series, that is the amount of current to be limited. LED resistance calculation is made simple with this calculator.