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Looks like a great deal, especially if there is a LM317 or some other voltage regulator involved as ThreeDogsNE said. I can't IMAGINE that is it just a plain old potentiometer mounted on a plate!

A good source for rare earth (neodymium) magnets is www.magnet4less.com I use the ND021 button style magnets for the stir plates I build, they are 1/8" x 3/8"

www.magnet4less.com is also a good place for magnets, they have a large variety of shapes and sizes. I use the 1/8" x 3/8" button style magnets, 2 for each stir plate. +1 to Accidic, it's important to get ones that are polarized axially. In my case, through the 1/8" dimension.

Sure, you can run the stir plate without the switch.

Jaybrinks, thanks for checking out the website! I strive to offer superior service and support to my homebrewing customers.

Fly, You can use two button magnets or one single bar magnet, both will work OK. Just make sure that your button mags are arranged with north pole up one side and north pole down on the other. I think the reason your stir stood straight up is the fact that your drive magnet is...

Yeast infection, the center pin is usually positive, so in this case you want to wire it to the red wire.

The white wire is the tachometer sensor wire. Not needed, just tape and store the end out of the way.

When you get time I would like to see a picture of the magnet arrangement on the fan hub.

That must be a pretty stout plate if you can mix DME and water in it! What size stir bar are you using?

Llysse, Yes, you can remove the four cover screws and check to make sure the two drive magnets are still seated properly. They should look the photo on the "Do It Yourself" page of my website www.stirstarters.com Stir bars usually don't go bad, so it's probably something inside the stir...

Hi, If that's a StirStarter stir plate, and I believe it is, since Rebel Brewer in one of the online retailers that sells my gear, it's guaranteed! I will ship you another stir plate if you will PM with a shipping address. I apologize for the inconvenience, I test every one before I ship...

Beautiful piece of work, RonRock!

Yep, I think I have stir plate envy!

Good looking gear, Gumby! I see you used my PVC spacer idea, how's that working out?

Awesome work, Bird! Now you have a nice cozy nest!

I have seen workable designs that use just one HDD magnet. I suggest you give that a try because with one magnet you won't have the spacing and pole interference issues that develop using two magnets. The HDD magnets I see are certainly large enough to spin a stir bar. Keep us posted on how it...

The power output of the heating element varies according to the square of the applied voltage. So, the "divide by four rule" applies only if you reduce the applied voltage to 1/2. If you reduced the applied voltage to 1/3, your power output would be reduced to 1/9, and so on.

The problem with the fermentation chamber idea is that you'll probably be measuring the ambient air temp with the controller and that temp could be a good 5 degrees cooler than the fermenting wort. There's some appreciable heat generated during fermentation. I guess you could take a SWAG and set...

Murphyslaw, Take a look at the "instructions" page on my website www.stirstarters.com, there is some useful information there on building your own stir plate. Maybe you can use this to figure out why your first attempt didn't work. Does the fan spin at all when you apply power?