Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > DIY Projects > stirplate question
LinkBack Thread Tools
Old 01-26-2012, 05:57 AM   #11
Feedback Score: 0 reviews
BBL_Brewer's Avatar
Join Date: Feb 2011
Location: Kokomo, IN
Posts: 3,698
Liked 425 Times on 295 Posts
Likes Given: 321


Originally Posted by tmd49 View Post
This is my problem; the pot is either off or on, no variable resistance. Should I get a bigger/stronger pot? I hae a 6v DC power supply with a 12v fan.
Try an LM317 or check out flomasters post below.

Originally Posted by Flomaster
so after reading the other 200 page DIY thread about using an old computer fan, hard drive magnets, radio shack potentiometer and a random power supply I attempted to build my own. after many a failed attempts and finally getting a working combination using a 18V JBL power supply I found it was spinning to fast for my liking even on the slowest setting.

I saw another thread about this usb fan on and said WTF might as well try it out. well let me tell you this works fantastic and is super easy to put together.

Video Link:

here is a link Video Link: to my fan its an 80mm fan I didn't think I needed to spend the extra coin on the 120mm fan.

Slots Down Brewery
Stick with the plan....not the sparge.

Never Ending Liquid Yeast - How to Farm Yeast and Freeze it.

BBL_Brewer is offline
Reply With Quote Quick reply to this message
Old 01-26-2012, 10:04 AM   #12
Why that human mask?
Feedback Score: 0 reviews
pompeiisneaks's Avatar
Join Date: Jan 2009
Location: Redmond, WA
Posts: 897
Liked 43 Times on 29 Posts
Likes Given: 2


That's the trick, figuring which you need for your specific fan. I don't know the answer. Sorry.

Fermenting/Kegged/Bottled NONE :( I moved to the NW and haven't had time to setup my brew rig since! (but hey, I'm in the Pacific NW so there's so much awesome beer I don't need to brew it as much hah!
pompeiisneaks is offline
Reply With Quote Quick reply to this message
Old 01-26-2012, 11:01 AM   #13
Feedback Score: 0 reviews
Join Date: Jan 2012
Location: Athens, Greece
Posts: 14
Liked 1 Times on 1 Posts


check here, it has all the info needed


I love that stuff and I can never get enough
Short reviews about beers and video games. What else would anyone want?

CalmDreamer is offline
Reply With Quote Quick reply to this message
Old 01-26-2012, 03:20 PM   #14
Feedback Score: 0 reviews
Join Date: Apr 2007
Location: Omaha, NE
Posts: 1,882
Liked 28 Times on 28 Posts
Likes Given: 9


Originally Posted by pompeiisneaks View Post
Um, those are for 120v no? Completely wrong kind. Not 12 or 24v.
No, if you put 120v into a LM317 your going to fry it. The LM317 voltage regulator will take any input voltage up to about a max of 38v and allow you to use a potentimeter to reduce the output. The output is capped to about 1v under your input voltage so with the right potentimeter your 24v supply could give you a output of 1(?)-23v to the fan. Odds are the stall speed of the fan will be your actual lowest threshold and be somewhere above the lowest threshold of the LM317.

info and a calculator:
camiller is offline
Reply With Quote Quick reply to this message

Quick Reply
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY Stirplate help chode720 DIY Projects 19 03-02-2011 03:19 AM
Help with DIY Stirplate scsi DIY Projects 18 02-22-2011 05:21 AM
DIY Stirplate -MagCraft NSN0592 Mounting Question jmferris DIY Projects 7 12-27-2010 01:46 PM
electrical question for 3 fan stirplate Opherman47 DIY Projects 4 05-26-2010 02:19 AM
Stirplate build......voltage question. tcMonk DIY Projects 8 10-28-2009 06:46 PM