LED Circuit Series and Parallel

152

01:14:38

1°- In series LED circuit.
2°- Parallel LED circuit.

The resistor is calculated whit following formula:

Vi = 7V - > Total voltage.

Vf = 2V ->the volts of each LED (2V).

Vf tot = 6V - > Total voltage calculated from the sum of the volts of each LED (6V).

If = 20mA -> 0.02A , the current of each LED.

R = Vi - Vf tot / If = 7V - 6V / 0.02A = 50Ohm
*it is a good rule to choose a larger resistance very close to the result.

I chose a 56 Ohm resistor

published 4 years ago

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