DIYbio Mini-Magnetic Stirrer

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Be cautious when handling liquids near electronic devices. Plan ahead to prevent accidents by anticipating potential spills and working carefully. This updated magnetic stirrer boasts a more powerful magnetic stir bar, increasing its effectiveness 2-3 times without altering the fan or design. To attach the new stir bar, you can either glue it securely in place or use PLA plastic friction welding (visit http://hackaday.com/2014/12/30/3d-printing-technique-friction-welding/ for guidance). A spacer is inserted below the cover to maintain a safe distance between the fan's magnets and the stir bar. Without this spacer, the magnetic field may become too strong, causing the fan to malfunction. Additionally, your specific fan model might require adjustments or additional spacers. Achieving consistent results with this stirrer requires patience and trial-and-error experimentation. It is essential to use a container with a flat and thin bottom for optimal performance. We have observed that different glass jars exhibit varying levels of effectiveness due to their distinct bottom designs and thicknesses. The provided SketchUp file includes the original design, along with all the recent updates. Here's a comprehensive list of changes: - Two 13mm nickel-plated neodymium magnets are added to an 80mm 12v DC fan for enhanced performance. - A 1mm spacer is introduced to adjust the height between the fan and the stir bar. - The new stir bar accommodates two 6x4mm nickel-plated neodymium magnets. - An updated cover allows for easier removal when connected to a power adapter.