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Home Brew Forums > Home Brewing Beer > DIY Projects > Chillers and Stir Plates > My Stirplate... Cheap and Easy Build...
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Old 12-14-2011, 12:17 PM   #871
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Quote:
Originally Posted by HenryVance3
I appreciate what you are trying to accomplish with using what you have. Can I just say from my experience in the DIY stir plate that having to match things like mili volts and amps with rpms and all the other variables is an absolute pain in the uterus! Unless you are a electric nerd that goes to robot wars I would strongly suggest the simple approach and buy a Fan like this
Video Link: http://www.amazon.com/gp/product/B002OJN250/ref=ox_sc_act_title_2?ie=UTF8&m=ATVPDKIKX0DER
The knob is relocatable and all you need is a USB wall wort and you are spinning!
Volts are typically only necessary to be in the ballpark (and not above) and a little lower is probably better anyway and with most fans 12v that is absurdly easy. Amps are the most important to match or exceed with your power supply. If you'd struggle to do either of these and your going to spend that kind of money, why not spend the extra $10-20 and get one with a good warranty and not mess with it at all?
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Old 12-14-2011, 10:39 PM   #872
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Bravo! Any issues with magnetism due to the thickness of the awesome case?

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Old 12-15-2011, 12:23 AM   #873
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Bravo! Any issues with magnetism due to the thickness of the awesome case?
None yet. Although I have no frame of reference with this being my first and only stirplate experience. Seems to get a near 2 L of water going just fine with a couple inch deep vortex.
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Old 12-16-2011, 10:50 PM   #874
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Another stir-plate gets its spins!

<--Video

stir-plate-001.jpg   stir-plate-003.jpg   stir-plate-004.jpg  
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Old 12-17-2011, 12:40 AM   #875
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Default Re-used Cigar box

Simple design. Computer cooling fan, old phone charger, switch and cigar box. Works great.

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Old 12-17-2011, 02:51 PM   #876
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Why do you set the flask right on the fan instead of closing the lid?

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Old 12-19-2011, 10:07 PM   #877
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Default Demagnetized my fan?

Hi,

I am currently working a variation of this build, using a cigar box for a project box and magnets that I got from work. For now I just had the fan wired a 5v cell phone without the rocker switch and rheostat hooked up while I was trying different configurations with the magnets. I am using small round 1/2" diameter magnets that I got from work, they are very strong.

Several days after I mounted the magnets, my fan suddenly does not work. It had been working great, but now when I plug it in it spins very weak a couple revolutions and then stops. Is is possible that my magnets were too strong and demagnetized the fan motor?

I will post a pic when I get a minute.

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Old 12-19-2011, 10:16 PM   #878
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Hi,

I am currently working a variation of this build, using a cigar box for a project box and magnets that I got from work. For now I just had the fan wired a 5v cell phone without the rocker switch and rheostat hooked up while I was trying different configurations with the magnets. I am using small round 1/2" diameter magnets that I got from work, they are very strong.

Several days after I mounted the magnets, my fan suddenly does not work. It had been working great, but now when I plug it in it spins very weak a couple revolutions and then stops. Is is possible that my magnets were too strong and demagnetized the fan motor?

I will post a pic when I get a minute.
I checked my wiring and that all looks good, any help would be appreciated.
imag0121.jpg   imag0120.jpg  
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Old 12-19-2011, 10:27 PM   #879
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Belay my last. I gave the fan a few spins while plugged in and it took off and it's working fine now. Still not sure what the problem was.

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Old 12-19-2011, 10:31 PM   #880
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Not sure if your fan came from an old computer, but if it was like mine, it probably had several years of accumulated ghost turds built up in the housing. Works like charm, though!

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