Hi
I'm working on a simple project but, alas, my knowledge of electronics is pretty poor, so I'm hoping to be able to pick a knowledgeable person's brain.
So in my project, I have a 30mm 5v PC case fan which I'm powering by plugging it into a USB hub - using the black and red wires in a USB cable.
I have a green power LED (taken out of an old PC case) that I would like to wire up so that it illuminates when the fan is plugged in. I originally thought I could just wire the LED directly into the circuit, but it seems I need to add a resistor?
Is someone able to tell me how I should wire the LED and resistor correctly, and what 'size' resistor I need?
I'm afraid I'm not sure of the voltage rating etc. of the LED, but as it's a PC one that plugs directly into the standard motherboard socket found on all PCs, I'm hoping someone here will know?
Thanks in advance.
I'm working on a simple project but, alas, my knowledge of electronics is pretty poor, so I'm hoping to be able to pick a knowledgeable person's brain.
So in my project, I have a 30mm 5v PC case fan which I'm powering by plugging it into a USB hub - using the black and red wires in a USB cable.
I have a green power LED (taken out of an old PC case) that I would like to wire up so that it illuminates when the fan is plugged in. I originally thought I could just wire the LED directly into the circuit, but it seems I need to add a resistor?
Is someone able to tell me how I should wire the LED and resistor correctly, and what 'size' resistor I need?
I'm afraid I'm not sure of the voltage rating etc. of the LED, but as it's a PC one that plugs directly into the standard motherboard socket found on all PCs, I'm hoping someone here will know?
Thanks in advance.