LED resistor calculator formula

@gLectronics

9 years ago

https://everycircuit.com/circuit/5332007424360448

Vin = 12V LED froward voltage => Vf = 3.2V LED forward current => If = 20mA R = ( Vin - Vf ) / If (12V - 3.2V) / 0.02mA = 440ohm