This is my second try at a DIY stir plate. I made it by taking a 12 volt computer fan with a couple of high powered hard disk magnets glued to the top, and screwing on a plastic surface through some rubber spacers. By using rubber spacers you can do some very fine adjustments to get the magnets as close as possible without letting them touch. The fan I used for the first model was not nearly as heavy duty. When the flask with the stir bar came in contact with the surface the magnets would pull the actual fan up against the plastic. I am guessing that the motor's shaft was loose. This one works GREAT!
Now all I need is to plan the brew date and get that yeast starter going!
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