Design criteria:

• It had to be usable in the field or the lab.
• Therefore, it had to be compact and easy to store and transport,
• ……and that includes the magnetic stirrer bar…..
• And it would need to run on batteries,
• As it also had to double as a lab stirrer, it also required power for long term use.
• It had to stir volumes from 10 to 1000 ml.
• It had to be feasible to fabricate.
• It had to be resistant to spills and chemicals.

Vitamins

• 2x M3x5mm screws for the PWM controller
• 2-3x M2x8mm screws for the charge controller
• 2x M2x10 mm nuts and screws for the rotator
• 7x M3x8mm screws for the lid and the motor clamp
• 1x M3x8mm nut and screw for the motor clamp
• 7x M3 Brass inserts
• 5 x 10mmØ x 3mm thick magnets.

Electronics:

• Pimoroni Amigo Pro USB-C charge controller
• LiPo 3.7V 1100mAh
• PWM controller
• Motor - https://www.aliexpress.com/item/33047774688.html?

If you want to buy me a coffee for the design, you can also purchase the files here: https://www.etsy.com/au/listing/1347129276