I have some 3 pin fan extenders laying around that I would like to make into Low-Noise adapters for my case fans.
I know the fans run at 0.23A at 12V but how much resistance would be required to drop the voltage to 8V.
I am not too familiar with this.
I am supposed to be dropping the voltage or amps, or is it that when introducing more resistance the volts and amps will both drop?
voltage controls the fan speed. Thats why on some cases you'll see 5, 7, 12 volt fan control switches. As for doing the math well, sorry I'm no electrical engineer so I couldn't tell how big of a resistor to get. Perhaps find a picture of someone cutting one open.
pretty sure the colored band what kind of resistance it is
Ah thank you, from looking at the description it is a 46.9 Ohm resistor which should be easy to find at my local radioshack.
The clue is the size of the resistor. These are big which means high wattage, and therefore able to dissipate heat. So these are voltage drop resistors. Low value, high power, resistor
And the math is easy, ohms law. V=IxR, I=V/R, and R=V/I. Where V is volts, I is current, and R is resistance.
you can as make these but to do it right you need a soldering station, they sell 3/4 pin voltage resistors for very cheap I would check Amazon and Performance PCs my guess is you could buy like 30 of the things for the price of the tools you need to make them yourself.
Yeah I am aware of all the adapters but I wanted to try it myself.
Also my prime 2 day shipping will only allow me to get the adapter in on Thursday.