HenryVance3
Well-Known Member
O after much tinkering I finally built my own stir plate with a 120 mm fan and a lm317 and a potentiometer to govern it. I glued a washer to the fan and two 1/2 inch magnets at opposite ends. The only stir bar I can get to spin is only one inch long anything bigger goes off balance at high rpms. What am I doing wrong?