12v fan on 24v duet

akrepsianka

Hello
My duet is powered 24v and i want to use 12v fan. İs it enough to use with resistor an will it damage the fan after some period of time? Or the board? İ will uei on allways on fans slot

dc42

Our recommendation is to use 24V fans - they don't cost much on eBay.

Phaedrux

Alternatively, you can do as I've done, and use a buck converter between the 24v psu to feed a 12v supply into the V_fan terminal of the fan jumper block. This lets the duet and everything else function off the main 24v supply and the fans all use 12v.

parovoZZ

@akrepsianka:

Hello
My duet is powered 24v and i want to use 12v fan. İs it enough to use with resistor an will it damage the fan after some period of time? Or the board? İ will uei on allways on fans slot

I'm using a resistor. An accurate calculation is required by Ohm's law. For blowing two fans 12V. It's OK.

DjDemonD

There are lots of threads on fans.
Easiest options:

use all 24v fans if you have 24v PSU
use all 5V fans if you can

Or search for buck converter/secondary PSU options.