I have read 100 tutorials on LED's and looked over many schematics, but none cover my question.
Do I need to use a resistor if the forward voltage = the voltage supplied?
x4 LED's
Forward Voltage: 3.0
Forward Current 20mA
Power Source: 12v
If I was using one of these LED's I could see needing a 470 resistor, but since I am using 4 LED's it's going to equal the supplied voltage. If I do use a resistor, I would not have the required voltage to power all 4 LED's. So, I just don't use a resistor right? But EVERY tutorial say's "ALWAYS USE A RESISTOR"... Is there something I am missing?
*These LED's will be hooked up in series. NOT in Parallel
If you know the answer, can you please explain it in detail. I am a quick learner, I promise I will understand
Do I need to use a resistor if the forward voltage = the voltage supplied?
x4 LED's
Forward Voltage: 3.0
Forward Current 20mA
Power Source: 12v
If I was using one of these LED's I could see needing a 470 resistor, but since I am using 4 LED's it's going to equal the supplied voltage. If I do use a resistor, I would not have the required voltage to power all 4 LED's. So, I just don't use a resistor right? But EVERY tutorial say's "ALWAYS USE A RESISTOR"... Is there something I am missing?
*These LED's will be hooked up in series. NOT in Parallel
If you know the answer, can you please explain it in detail. I am a quick learner, I promise I will understand