Duet 3 mini 5+ connecting fans

Stephen6309

@Alucardi I use OUT5 and OUT6 for two wire fans on mine. Make sure to set the voltage jumper for what your fans need.

Phaedrux

https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+3+Mini+5++Guide+Part+1:+Wiring/87?lang=en

Specifically steps 10 and 11.

Alucardi

well there is something wrong cause it keeps burning my fans now. I killed 3 fans! WTF it was working fine last night but now out of the blue it kills my fans. I had 3 12v blowers and 2 cooling fans all dead. Even tried pc fan and it died to. What can i can?

Veti

@Alucardi

are you sure you changed to jumper to 12v? 24v will burn out the fans.

Alucardi

@Veti no. I must have miss read. I read it as 5-6 was set on 12v and 3-4 was vin but it was the other way around ‍️
I do have a few 5v blowers. I also have a bukconverter. Can I just pull power from that? If so do I just connect plus to the converter?

Veti

thank you for running the test.
i always wondered how long 12v fans would survive on 24v.
so apparently not long.

Alucardi

@Veti lol not even a second! Btw can I just connect the + to a buck converter and run that on 5v and - to OUT6? Cause I have several 5 volt blowers but no more 12v.

Veti

that should work, but it would be best if someone else can confirm this works on the mini as well.

Alucardi

@Alucardi said in Duet 3 mini 5+ connecting fans:

@Veti lol not even a second! Btw can I just connect the + to a buck converter and run that on 5v and - to OUT6? Cause I have several 5 volt blowers but no more 12v.

@dc42 can you confirm?

dc42

@Alucardi said in Duet 3 mini 5+ connecting fans:

@Alucardi said in Duet 3 mini 5+ connecting fans:

@Veti lol not even a second! Btw can I just connect the + to a buck converter and run that on 5v and - to OUT6? Cause I have several 5 volt blowers but no more 12v.

@dc42 can you confirm?

Yes, that would work,. However, as well as blowing the fans, it's quite likely that you have blown the fan mosfets on those outputs.

Alucardi

@dc42 i tried them with a pc fan and it was fine.

dc42

@Alucardi said in Duet 3 mini 5+ connecting fans:

@dc42 i tried them with a pc fan and it was fine.

That's good news!