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Dropping resistor for LEDs

To use the calculator you need to enter the parameters of a single LED (its voltage and current), the voltage of power supply, number of LEDs and to choose LEDs' connection (serial or parallel). The calculator will compute value of a dropping resistor needed in the ciruit and its minimal power.

Single LED parameters:

U and I :


Uled :
 

Iled :
 

Supply voltage U:
V


Number of LEDs:


LEDs' connection:





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[ekalk]© Sławek Wernikowski, 2012-2023. Set of useful interactive calculators for electronics constructors and hams.


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[N2.00 2023-08-07][]