"custom" fan doesn't work

[dc42]

@the_dragonlord the signal level on pin exp.heater5 is 3.3V. Does your mosfet switch work with just 3.3V control input?

[A Former User]

@dc42 uh...I don't think so....what other pin should I use to make it work?

[dc42]

@the_dragonlord is the e1heat output free?

[A Former User]

@dc42 said in "custom" fan doesn't work:

@the_dragonlord is the e1heat output free?

no, I have two extruders

[A Former User]

@dc42 said in "custom" fan doesn't work:

@the_dragonlord is the e1heat output free?

any idea?

[engikeneer]

@the_dragonlord if you're out of heater and fan outputs on the main board, then you'll need to use the expansion header with a 5v step up. Easiest option is to get the expansion breakout board
https://www.duet3d.com/Expansion_Breakout

Alternatively go full Duex...

Or see if you can find a mosfet that works with 3.3v

[A Former User]

@engikeneer said in "custom" fan doesn't work:

@the_dragonlord if you're out of heater and fan outputs on the main board, then you'll need to use the expansion header with a 5v step up. Easiest option is to get the expansion breakout board
https://www.duet3d.com/Expansion_Breakout

Alternatively go full Duex...

Or see if you can find a mosfet that works with 3.3v

but isn't there any other pin that can be used without purchasing an expansion board wich is unuseful for my purpose? My only goal is to configure a pin (whatever pin) as a fan to command my Water Cooling Kit. I'm using a Mosfet because I don't want to overload the board. The pump has 10W of power and there's a 80mm fan too...

[cosmowave]

@the_dragonlord You can use a step up converter from 3.3v to 5v

[dc42]

@the_dragonlord is the PS_ON pin free? All the pins on the expansion connector have 3.3V signal levels.

[A Former User]

@dc42 said in "custom" fan doesn't work:

@the_dragonlord is the PS_ON pin free? All the pins on the expansion connector have 3.3V signal levels.

yes it is

[dc42]

@the_dragonlord you can connect the mosfet switch control input between VIN and PSON then.

[A Former User]

@dc42 said in "custom" fan doesn't work:

@the_dragonlord you can connect the mosfet switch control input between VIN and PSON then.

I can't find that pin in the pinout image...where is it located? But is it customizable to work as a fan? Looking for the usable pin names for the Duet 2WiFi I don't see PSON, it looks to be available only for the Duet 3, is it?

[dc42]

@the_dragonlord I confirm that "pson" is a supported pin name on Duet 2. It is not PWM-capable. You will find it on the external 5V connector.

[A Former User]

@dc42 said in "custom" fan doesn't work:

@the_dragonlord I confirm that "pson" is a supported pin name on Duet 2. It is not PWM-capable. You will find it on the external 5V connector.

Uh yes, found it! So can I use:

M950 F10 C"pson"
M106 P10 S1 H1:2 T50 ; set fan 1 value. Thermostatic control is turned on

to make it work? is it pson or ps_on in case?

[dc42]

@the_dragonlord both "pson" and "ps_on" should work.

[A Former User]

@dc42 said in "custom" fan doesn't work:

@the_dragonlord both "pson" and "ps_on" should work.

it works like a charm!!!!

Thanks a lot! @dc42