Magnetic stirrer from a 80 mm fan

I needed to keep a solution of Chelex constantly stirring so that the beads wouldn't just sink to the bottom during pipetting. I could move equipment around the lab, or move my work to the equipment — OOOOOR I could make my own personal stirrer so that I never have to share equipment with anyone! I like that.

[A demonstration video of this mixer is here.](https://www.youtube.com/watch?v=Tg3VifZmiEc)

This mixer is made using a standard 80 mm computer fan hooked up to a multi-voltage power adaptor, which is how you control the mixer's speed. I designed it so that the magnets would be as close to the platform's surface as possible, which keeps the stirring bar stable when you're mixing larger volumes at higher speeds, or mixing viscous liquids (like vape juice, apparently). Heck, put a stirring bar into your bubble tea and keep your bubbles well-distributed, whatever you like!

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### Bill of Materials

#### Tools

- A **long-stemmed screwdriver** that can fit through the fan's mounting holes
- **Hot glue gun**
- **Mallet**
- **Magnetic stir bar** (or a screw or nail or any other magnetic object depending on your needs)

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#### Printed components

- 1 × **stirrer enclosure.stl**
- 1 × **stirrer magnet mount.stl**

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#### Electronics

- 1 × **80 mm computer fan**
- 4 × **standard PC fan screw**
- 1 × **3.5 mm female jack** ([AliExpress Example…