Just out of curiosity, how did you get the magnets out of the HDD? I took one apart earlier this week, and it appears that the magnets are epoxied to a metal plate. I am assuming that the magnets you are talking about are the ones that support the arm in the drive?
Edit: Figured it out on my sacrificial drive....there was a layer of adhesive, but it was not epoxy like it appeared. Was able to crack it with a longer screw in the mounting hole that was below the magnet.
Well done.
Just some info:
The yellow wire is not a fan ground, it's the RPM signal out.
Cheers,
ClaudiusB
My solution to all the different problems I have encountered, flasks shapes, sizes, etc.
The four magnets have a pull force of 5 lb each.
2" stirbar in action.
Cheers,
ClaudiusB
Good choice.A LM317 voltage regulator should handle these fans plus the best adjustable speed control.
3/8" DIA x 5/16"what is the thickness of those round magnets you glued to your fan motor?
Are you sure?The above reply you stated they are 1/2" diameter.
hey guys i built this just the way it says to. i can get the led on the switch to come on but i can't get the fan to come on. my fan has 2 black wires. and my power supply is an old plug or a small drill charger. anybody know why it won't come on?
I mocked up my stirplate and something just ain't right. I'm using a 12V power supply with a surplus .2 amp fan. I epoxied a big washer to the hub and am using 2 rare earth magnets, a 2" stirbar, and a 2L flask. So my problem is that it's very difficult to get the stirbar to "catch" and it usually gets thrown. When I can get it to catch the vortex only goes about halfway down the liquid level and certainly isn't the maelstrom of bubbles everyone else seems to have. What's the likely culprit? Magnets? Positioning? Spacing? I have a suspicion that my fan is spinning too fast and isn't torquey enough but would like to hear everyone's thoughts...
Posted by BrewBeemer
Good choice.
3/8" DIA x 5/16"
Are you sure?
Put the beer down.
The stir plate as pictured uses 3/8" magnets.
Cheers,
ClaudiusB
Will work with fixed and adjustable speed control.fermenator wrote:
adjustable voltage from 3-12v, i would assume this could work, no?
I have a question, i know i can use extra 10/32 nuts for spacers (btw, how many?) but what are the "¾ inch stand offs"? Can these be bought at Lowe's or Home Despot or is this just something you had on hand??
Yes - Lowes carries them... I used them on my stirplate.
thank you!
now i understand why big starters are worthwhile, more yeast! i never really understood the 1 gallon starters some of you guys would do, i figured it all got poured into the fermenter haha. this was one of those "ooooooooh" moments for me!
also, how long before pitching do you guys turn off your stir plate? i am assuming the yeast needs to settle a bit before? could you throw the flask in the refrigerator to help separate the yeast?
On slow it will only make the vortex about an inch. Its also spinning 2000ml of plain water I would think that wort with yeast would be a little more viscous
I found that positioning the magnets while the stir bar is on top helped me find the magnetic center and the rotational center.
This is a magnet and the 1" stir bar configuration that works.
So that lead me to take a couple of smaller magnets and spread them out. Now the configuration looks like this for a 2" bar with a 2" magnet spread.
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