Just a quick question, I just took apart an old pc and it has a simple power led. It was attached directly to jumpers on the mother board (power led, activity led and hdd led)
Can I use it on the RPi just like that? Or do I need resistors on all the use cases?
I am totally noob at electronics, just wanted to start playing around with GPIO pins.
I was reading a lot of posts, that you should use the resistors to help to protect the board in case you accidentally supply higher current on your end, but if my circuit is just a simple led do I also need to use them?