50mm fan from 24v to 12v

[Pekish79]

would you use a resistor PPC82W-2CT-ND or voltage regulator (LM7812) to change the 50mm fan with a 12V fan

[Matt_Sharkey]

A regulator i believe would be the best choice. The resistance of the fan changes as it spins up, so using a resistor would be unreliable (or rather too reliably steady.)

a quick and dirty method would be to put two 12V fans in series and since they will spin up at the same time, they will have a similar resistance profile, and won't burn out.

perhaps you could fashion a front and back cooling fan setup?

[Tim]

A buck converter regulator (search the forum for "buck converter") is much better, as the load of a fan isn't particularly constant, so you can't guarantee a drop of 12V across the resistor. You can use a stock 12V regulator but the buck converters (which are just a regulator + caps + small circuit board) are easy to install and wire up, and, surprisingly, they don't cost much more than the resistor or LM7812 regulator, bought at single-component quantities.

[Pekish79]

cool thx i will investigate for it i am not in a rush to change the fan because the current one is working just fine but as long term project i would like to make the machine a little bit more quite as my office is open space and i feel better if i don't bug other people with the noise

i will look for the buck converter right away i was thinking as well about 2 fan

[insta]

Surely you can just get a quieter 24v fan?

[SouthSideofdaSky]

Yeah, if your goal is noise reduction I'm not sure that changing the wiring is the way to go. Fans seem to get louder as they age and are generally unpredictable.

Although it's more expensive, you might be better off making an enclosure. I have mine in an office environment in an enclosure and it's barely audible once there is a few feet and an object between me and the printer (e.g. a cubicle wall, etc.)

[Pekish79]

I didnt find many 50mm fan 24v and surely not around 21-23dba

I only looked on newegg but if you know of any 24v fan that is quite let me know i guess i could look for 60mm as well i doubt is a problem if that fan is a little bit bigger

the real problem is find good fan at 24v

the Noctua 60mm that as well 12V is 20dba (actually 19 something at 3000rpm - Airflow 29,2 m³/h)

I could enclose it but i rather try the fan first i don't like too much the idea to keep it enclose (not for a particular functional reason just i like to easily access it in any moment without an extra step)