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Air Purifier  

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Air Purifier

Hello, does anyone know how I’d go about connecting this fan ( 1" target="true">Noctua NF-P12 redux-1700 PWM, High Performance Cooling Fan, 4-Pin, 1700 RPM) to my MK3S if it’s even possible? I’m using it as an air purifier for my enclosure and I want it to turn on when my printer turns on. Any suggestions?

This topic was modified 10 months ago 3 times by Jacob
Posted : 23/01/2021 5:44 pm
RE: Air Purifier

This appears to be a 12 volt PWM controlled 120mm square fan. 
Your Mk3 Printer is a 24 volt printer. so there is no direct power source to drive the fan. 
there are 4 wires 
+12 Volts, 
Tacho signal 
PWM signal

Noctua see, to say that you can use a 4 pin fan where you would normally use a 3pin fan. so I expect that you could run this fan with Just +12volts and  Ground ( the tacho pin is an output that you can simply ignore... )  But you don't have 12 volts on a Prusa Mk3 Printer. You could use an external wall wart to drive the fan, and just turn on the fan, when you want it...    If you have a 2 socket extension lead, you could use the wall switch to turn everything on and off together. 

Or you could get a DC tp DC Buck Convertor   and drop the 24 volts off the power supply to 12 volts for the fan. 

your normal printer fans are 5 volts, so their supply is not suiteble


regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 23/01/2021 7:00 pm
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Topic starter answered:
RE: Air Purifier


Okay! Thanks for the help!

Posted : 23/01/2021 7:03 pm