Magnetic stirrer

The magnetic stirrer is a laboratory instrument that mixes liquids using a rotating magnetic field, eliminating the need for direct physical contact and reducing the risk of contamination.

This magnetic stirrer is made using a standard 80mm computer fan connected to a 12V power supply equipped with a standard 5.5mm x 2.1mm jack (positive pole inside, negative pole outside) and a PWM speed controller.

You will need the following parts:

- 12V power supply with a standard 5.5mm x 2.1mm jack

- 80mm computer fan

- PWM speed controller

- 5.5mm x 2.1mm DC Female Panel Jack

- Two 10x3mm neodymium magnets

- Twelve 6x3mm neodymium magnets(stir bar)

You can see it in action here.