CPU fan size for stir plate

[Gmj1980]

Hello I am attempting to build a stir plate but when i went to grab the old cpu fan from an old computer i noticed there where three all different sizes is one better than the other or does it even matter?

If it doesnt matter has anyone attempted a double sided stir plate since i have a couple of fan

ANY HELP WILL BE HELPFUL THANKS


Primary:NONE
Secondaryouble Chocolate Oatmeal Stout
On Tap:Anderson Valley Clone

 

[user 84304]

The size really only makes the difference in your box size. Bigger fans *may* have a bigger motor, but power isn't as important as controlling your RPM so you get the stir speed you want(not too low or too high).

As far as a double stir plate, I can't see why not. You'd just need to double the components and figure out the power setup that works best(be it independant of each other, bigger adapter, etc). I suck at electrical stuff, but I'm sure someone here can help you with that.

Cheers!

 

[Catt22]

120 mm fan FTW

Here's a double set up I built using a single power supply:

 

[Reidman]

120 mm fan FTW

Here's a double set up I built using a single power supply:

Video Link: http://www.youtube.com/watch?v=qzXZDqYcs14

Did you have to modify the fans at all or is it as simple as powering them up and throwing in a stir bar?

 

[Flomaster]

80MM fan works just fine...

here is my fan
http://www.amazon.com/dp/B00080G0BK/?tag=skimlinks_replacement-20

it comes with your speed controller.

here is my stirplate in action.

http://db.tt/HqIVgei


using that can is by far the easiest quickest plug in play no head ache method there is


-=Jason=-

 

[ndsgr]

This was a 10 minute fix when I realized I was short by about 500ml the week of brew day. It was simple, just wiring the second one in parallel.

I'm buying a 2L flask this week, so hopefully my second gets retired.

As already stated, size won't matter too much. It's the speed. I have some large ceramic resistors in series with a potentiometer I had that wasn't quite big enough. The "sweet" spot for speed is right in the middle of my adjustment range.

EDIT: By large I mean in size, not resistance.

 

[Catt22]

Did you have to modify the fans at all or is it as simple as powering them up and throwing in a stir bar?

No modification is required other than mounting the magnets on the face of the fan. This fan is supplied with a matching speed controller. The wiring is configured so you can daisy chain the power supply and it's plug and play. Actually very simple to put together.

 

[ndsgr]

80MM fan works just fine...

here is my fan
http://www.amazon.com/dp/B00080G0BK/?tag=skimlinks_replacement-20

it comes with your speed controller.

I like that setup. If mine wasn't free, I would definitely have went that route instead of matching pots and resistors. My buddy is trying to build one, I'm sending him the link.

 

[Flomaster]

I like that setup. If mine wasn't free, I would definitely have went that route instead of matching pots and resistors. My buddy is trying to build one, I'm sending him the link.

I went with the DIY pot, speed control thing. I couldn't find a fan and power supply what worked together. so i said fuggit.

saw another thread here on HBT talking about it and I went for it.

best thing ever...

-=Jason=-

 

[awoitte]

For everyone that bought the 120mm fan - https://www.amazon.com/dp/B00080G0BK/?tag=forumyield-20 - How did you manage to move the controller (detach from fan) and mouth it elsewhere. Currently its fixed to the fan housing, so out of the box there's no way to adjust speed when the stir plate has a flask sitting on top of it....

 

[golfindia]

I use regular PC fans with these adjustable DC to DC regulators.

https://www.amazon.com/SainSmart-Ad...DC+regulator&qid=1567625088&s=gateway&sr=8-30

The push buttons are convenient to change speed.

 

[homebrewfinds]

I've found the 120mm fans work well. If you can find the right size magnets and have access to a 3d printer, this REALLY helps.... https://www.homebrewfinds.com/2015/02/3d-printed-stir-plate-magnet-mounting-thingy-with-videos.html

 

[awoitte]

I've found the 120mm fans work well. If you can find the right size magnets and have access to a 3d printer, this REALLY helps.... https://www.homebrewfinds.com/2015/02/3d-printed-stir-plate-magnet-mounting-thingy-with-videos.html

I actually have access to a 3d printer at work, but I've never used it and have no experience in them. Are there plans you can share to model what is in your attached?