Show us your DIY stir plate!

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Johnny_Duck

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Here’s mine using the thermal take fan from Amazon. Unfortunately, the throttle is no longer working and I can’t diagnose why. Oh well, time for a new build.
IMG_2275.jpg
 

LittleRiver

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The case is black walnut, with 1/4" oak plywood bottom & top panels.
IMGP0007.JPG


I put some holes in the bottom so the fan can move some air past the heat sink. Not necessary, but there's a fan there so why not?
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The magnetic link is so strong that throwing the stir bar is not a concern.
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The white piece of foam holds my selection of stir bars.
 

Brewbuzzard

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Nice setup! Mine is a bit less complicated and more seat of the pants. I used a new fan from MicroCenter and a plastic food storage container from Walmart. The fan is wire to a potentiometer from Radio Shack. I used a 12V transformer that I had laying around fitted to a plug from the Shack. I plan on redoing it with new controls to control the speed more accurately. The neodimium magnets are from Michael's and are epoxied to the hub of the fan.

Here is a quick pic of it in action stirring up some Wyeast American Ale II for some cider:

View attachment 21122
Ok I love that plastic ware. We have them, no more digging for a frecking lid.
 

ThinBrewLine

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Here is my super cheap, basic stir plate. It gets the job done.

1. Get an old computer fan
comp fan IMG_0751.jpg


Wire it to a variable voltage adapter like this old one I had lying around:
controller _0756.jpg


Get an old hard drive and pry it open to get the magnet:
Hard drive IMG_0748.jpg

Magnet from HD IMG_0749.jpg

Glue magnet to the center of the fan:
Magnet on fan IMG_0750.jpg


Put "risers" on the fan corners so that the vessel will be able to sit upon the fan without actually contacting the magnet:
fan w mag and riser.jpg

here is a different angle:
Fan risers IMG_0753.jpg

Viola!
best stir pic.jpg
 

Brewbuzzard

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Here is my super cheap, basic stir plate. It gets the job done.

1. Get an old computer fanView attachment 581701

Wire it to a variable voltage adapter like this old one I had lying around:
View attachment 581702

Get an old hard drive and pry it open to get the magnet: View attachment 581703
View attachment 581704
Glue magnet to the center of the fan:
View attachment 581705

Put "risers" on the fan corners so that the vessel will be able to sit upon the fan without actually contacting the magnet: View attachment 581706
here is a different angle: View attachment 581707
Viola!
View attachment 581708
Where's the duct tape? Looks like it works just fine.
 

chiefwigms

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Was searching for a while, and found a dude on somethingawful that had a sweet design - he uploaded it to thingiverse if anyone is interested..

make (120mm w/ 5cm stirbar):
print.jpg

Medium speed:
low.jpg

Full Speed:
high.jpg
 
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I just finished this one. I'm quite happy with it. I couldn't find a wooden box so I just made one. Lights, switch and speed regulator came dirt cheap from China. I burned the pattern in and used some akryl varnish on the wood. Enjoy!
 

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revinax

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I repurposed a bathroom exhaust fan and rheostat. Pry up a few tabs to free the blower assembly plate, flip it over so the blower is on top. Attach hard drive magnets. Wire the rheostat. Top it with a plate, a transparent plate helps line up the flask or flat bottom coffee carafe. It's all 110V, no tranformer needed. An earlier prototype is shown at the right.
stir plate.jpg
 

Carrollyn

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4082B8ED-473B-4EF4-905E-4FA4E2382390.jpeg
My son made this for me from a computer fan and spare adapter. I wanted a sturdy base, so there’s the plywood. He also made me an air circulator with a computer fan for my “Beverator” beer fridge, so now I don’t worry about cold (freezing) spots if I turn it way down. The cord I sent thin enough to close the door on.
0C00B92E-5B1B-4EEB-9F9F-2D92E57F1D9C.jpeg
 

Goblin22

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Highly engineered!
Small project motor, 1" neodymium magnet, 2x4, piece of fence board or something, old phone charger, and a breadboard... which I didn't need at all.

I was looking how you guys made them, and y'all used stuff around the house which is really cool. Brewing on a budget

under.jpg
over.jpg
 

Hang Glider

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Beer is skunked by ultraviolet light, but it takes a combination of the hops, yeast, and barley all together to make that result. I cannot imagine yeast, by itself, is light sensitive in this regard.

just my $0.02 :)
 

NGD

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Beer is skunked by ultraviolet light, but it takes a combination of the hops, yeast, and barley all together to make that result. I cannot imagine yeast, by itself, is light sensitive in this regard.

just my $0.02 :)
My understanding is that LEDs do not produce much ultraviolet light unless designed to do so. They typically drop off in the 450-485nm range.
 

InspectorJon

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Simple build using an old business card file box. Any box would do really. For folks that do not get all the soldering and electronics or don't want to mess with it this USB fan is a great option. Comes with a speed control and it is plug and play using any USB phone charger. Everything that I needed came with the fan with the exception of the box, the USB charger and the magnets which I still need to get. I guess unlike everyone else, I got rid of my old computers from the 90s so I don't have an old hard drive laying around. With tax I have $15 invested I this so far.

upload_2019-5-13_9-58-46.jpeg


upload_2019-5-13_9-59-0.jpeg


upload_2019-5-13_9-59-21.jpeg
 

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NGD

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Simple build using an old business card file box. Any box would do really. For folks that do not get all the soldering and electronics or don't want to mess with it this USB fan is a great option. Comes with a speed control and it is plug and play using any USB phone charger. Everything that I needed came with the fan with the exception of the box, the USB charger and the magnets which I still need to get. I guess unlike everyone else, I got rid of my old computers from the 90s so I don't have an old hard drive laying around. With tax I have $15 invested I this so far.

View attachment 626595

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View attachment 626597
Thanks for showing a close up of the fan. Thats pretty trick for those of us solder-challenged.
 

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