I have a peoce of electrica equipment which has a blue LED to show it is on. I want to change it to a green LED - how do I tell what LED I need to order?
Ideally you need to know the voltage across the existing led and the current through it. I once changed a yellow led to blue in the shift key on a microwave sig gen so I didn’t confuse it with the ”RF ON” yellow led. Problem the blue led was so bright I had a blue searchlight in the room. So had to change the dropper resistor you may need to do likewise.