The BrewStir. It's a magnetic stir plate for homebrew.

Just another magnetic stir plate using a 12VDC fan, with allowances for a speed-controlling regulator. Has new changes as V2.
New: added feet for #8 screws.
Video of early test:
https://youtu.be/LTQn-agubDQ
The unconnected gizmo in the short video is a voltage regulator which I later attached to use as a speed controller.

Try this out with my [stir bar](http://www.thingiverse.com/thing:999260). Or don't; a real stir bar is best and they can be had for cheap.