Both types have PWM pins for speed control. I however do not have a controller.
I would like to set the speed of these fans to something other than the max speed while not having to build a PWM controller to control the speed.
My input power comes from a 220VAC - 12VDC ~2A transformer.
I have tried putting a 450 ohm resistor before the fan, this makes the fans not start at all.
Having two fans in the circuit either serially or in parallell also makes the fans not start at all.
My concern is the noise from the fans when they run at maximum speed, I could have two fans if that would work, only if they don't run at maximum speed.
Is it possible to modify any of the static input parameters to change the fan speed? I have some old VCR, PC parts that might contain the missing things, so tell me what I need and I'll see if I can find it.