Hey guys, i am trying to design my own stir plate for making yeast cultures. a good example of what i am talking about can be found here. http://onebeer.net/sp_howto.shtml I am basically trying to take a project box, attach a nice motor to it (the tutorial above uses a computer fan, i want something that is sturdier) then have a magnet with a hole screwed onto the motors axel. Then i want to wire it through a rheostat so i can control the speed. My problem is i cannot find a motor for cheap enough, if a computer fan can do this there should be some really cheap motor out there that can handle it. If anyone can help me figure out what kind of motor i need that would be amazing. I also just need a good website to source all this stuff from, but i can seem to find one, i am fairly new to this hobby engineering field.