I want to replace the two noisy 24v brushless fans on my printer with high performance silent 12v fans, more specifically Noctua A4x10 FLX
The 3D printer hot-end fan is on continuously with 24 volts, so I can use a DC regulator such as LM2596 to achieve a constant 12v to power the fan. The part cooling fan on the other hand uses variable voltage to adjust the speed of the fan during the printing process (Probably between 14-24V). I would like the 12v fan to be able to vary it's speed just like the 24v fan does. From what I understand using a LM2596 will not allow the voltage to vary and will just continue to put out solid 12v.
Is there a way to allow this variable fan speed functionality to translate to a small 12v fan? Is using a simple voltage divider circuit the answer?
Thanks to Dampmaskins comment it looks like the variable speed part cooling fan is in-fact PWM. In that case is it possible to convert 24v PWM to 12v PWM?