Considering doing a certain style of 12 volt fan mod.
Taking 12 volts from the bottom side of the power plug in. But what I want to do is trim the power down to 9 volts before entering the fans.
Now, I could do the rheostat method. Nothing wrong about that.
But I am wondering about just putting a resistor inline on the positive wires going to the fan set.
What ohm of resistance would I need to knock 12 volt down to 9 ?