I have a 5v fan rated at 0.36Amps. i have wired this into the usb port and it works great but it's very loud and i'm wanting to decrease the voltage so it's quieter. now i have done a little digging but i'm still not 100% sure what i need as i don't want to blow the usb port by demanding too much current as the port runs upto 500miliamps.
So any ideas which resistor i need to say lower the voltage to 3v? and perhaps 2v?
That's exactly what i needed, i think i'll start from 5ohms and work my way up.
I'm making it for my laptop. the inbuilt fan is constantly turning on and off and it's very annoying. so i thought i'd use the usb port via the motherboard pins and run it from there so the fan is constantly going and at a lower rate too.
Most Bios software allow fan speed modifications.... If your fan is switching on and off regularly... You need to sit the laptop on a firm surface ( laptop tray) as its overheating... I hardly hear the fan on mine.... But mine is always on the table... ( plenty of circulation ).
BTW... They are not called Laptops anymore ( for this reason ) They are now called notebooks...