windozeuser
Member
I Know How To Calculate the Resistor Values of led's connected in series but how do u do it for parallel
I Got 4 led's with a operating voltage of 1.8 volt's each at 20 milliamps
I Need To Run This From A 12 volt Source
4 led's * 1.8 volts = 7.2 volts Led's Require 7.2 Volts in series
12 vdc - 7.2 volts = 4.8 volts Isnt Needed
R = 4.8 volts / 0.02 amp = 240 ohm
So I Would Need a 240 Ohm Resistor To Power These Led's Safely. But How Would I Do This In A Paralel Config.
I Got 4 led's with a operating voltage of 1.8 volt's each at 20 milliamps
I Need To Run This From A 12 volt Source
4 led's * 1.8 volts = 7.2 volts Led's Require 7.2 Volts in series
12 vdc - 7.2 volts = 4.8 volts Isnt Needed
R = 4.8 volts / 0.02 amp = 240 ohm
So I Would Need a 240 Ohm Resistor To Power These Led's Safely. But How Would I Do This In A Paralel Config.