Calculation of the resistor value

@Artyom_Grigoryan

5 years ago

https://everycircuit.com/circuit/4800376417812480

Determination of the resistor value with three series-connected LEDs. 9V - (2V + 2V + 2V) = 3V 3V / 0.02A = 150 Ohm The required resistance of the resistor for the correct operation of the three LEDs is 150 Ohms.