Help with resistor calculator for LEDs Answered
Hi everyone, I decided to try and build some LED lighting and found a few online resistor calculators but, I'm not exactly sure what to put for the voltage drop and the LED current (other than using the generic suggestions from the online calculators). So here are my questions...
Is the "forward voltage" what you enter for the "voltage drop"? If so, do you use the lower or higher number?
For the LED current, do I use the "max cont. foward current" or should I just put in the suggested 20mA? what kind of a difference would one be over the other?
These are the specs given for the LED I'm going to be using (minus the unimportant stuff).
Forward Voltage (V) : 3.2 ~ 3.8
Reverse Current (uA) : <=30
Absolute Maximum Ratings (Ta=25°C)
Max Power Dissipation : 80mw
Max Continuous Forward Current : 30mA
Max Peak Forward Current : 75mA
Reverse Voltage : 5~6V
Thanks in advance.