Nikolaj Møbius have developed a magnetic stirrer. We are now looking into publishing it in one of the new open source hardware journals.
The (electro) magnetic stirrer was developed as a proof of concept and it works quite well.
It uses 3 electromagnets to generate a rotating magnetic field thus having no moving parts instead of the classic magnetic stirrer design which uses an electric motor to rotate a permanent magnet.
1. Bill Of Materials
1X Protoshield REV3
1X L298N Dual H-Bridge 3A Motor Driver Board
1X 10K Potentiometer W. nob
1X Power Adaptor
Wood base plate
Raw PCB plate