Blue LED Resistor value?
Posted: Nov 27th, '17, 16:52
if I wanted to change the color of the LED to a blue would I have to change the value of the resistor as well or would the one for Red work on it?
Blue LED's have generally a higher forward voltage (voltage drop across the diode) than other colors. Hence less mA will flow through a blue LED at the same resistance - so actually no problem.... but...
I wouldn't recommend blue LEDs in general! I used them on a couple of projects and can confirm what others are saying too: IT'S A VERY ANNOYING, IRRITATING AND BLINDING LIGHT TO YOUR EYES!!!
Of course warnings didn't keep me away from using blue LED's then... so here are some advices.
- blue painted LED housings are much better than clear housings
- blue LED's under matt transparent buttons are much better than direct radiation
- check different resistor values for comfort for your eyes... I went up to 3k3 (instead of 200R) on one of my projects.