I'm getting ready to build my first DNA20 mod and have a question. I am going to use an anti-vandal button with a 3v LED in it. My question is, being that the battery will meter at 4.2v when fully charged, should I use a resistor for the LED?
I'm not sure if that little increase in voltage will cause the LED to burn out that much faster. And if I use a resistor to drop it from 4.2v to 3v, will the LED not light once the battery gets down to 3.9v? Or is there a pretty wide range on LED voltage?
I'm not sure if that little increase in voltage will cause the LED to burn out that much faster. And if I use a resistor to drop it from 4.2v to 3v, will the LED not light once the battery gets down to 3.9v? Or is there a pretty wide range on LED voltage?