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Power and hdd led max current question

post #1 of 3
Thread Starter 
I'm going to swap out my blue power and hdd LED's with red ones. The voltage coming from the motherboard is 5 volts and the led's that I'm looking at have a forward voltage of 2.2V typ. 2.8V max, so I've calculated to use 100 ohm resistors for the led's. I think that part is okay, but what I'm concerned about is that I can't seem to find what the max current draw from the motherboard should be. The LED's that I'm looking at have a 20mA current with a max forward current of 30 mA. I've looked through some threads here and from what I've seen that current draw should be okay, but I'm hoping that someone could confirm that. I don't want to risk damaging the motherboard. Thanks for your time!
post #2 of 3
I went down a rabbit hole with no direct answers. The good news is that I have read of multiple people using similar current draw LEDs without issues. I too have used different LEDs without problems. I'm going to go out on a limb here and say that if an Arduino can do 50ma to light LEDs, then a motherboard is probably also capable of that without damage.
post #3 of 3
Thread Starter 
Thanks for the reply! I thought that it would be fine, but just wanted to make sure. Thanks again!
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