We needed a stir plate for empowering our yeast for homebrew. It probably took us about 1 hour of actual work to get this little beauty made.
Bill of Materials:
1 Metal Bar (Stir Rod)
1 PC Fan
1 12v Wall Wort
1 Hard Drive – NOTE: We only need this for the magnets inside. This destroys the hard drive and any/all data on it. I had a dead hard drive laying around. Don’t use one you care about.
The idea is you take the magnets out of a hard drive, glue them onto a standard PC fan, then turn the fan on to spin the magnet which spins the stir rod in a beaker.
I’m trying to get better about taking pictures the entire time I’m working on stuff… This is all I really have for this one though.