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Magnetic stirrer
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Model information
- Source
- Printables
- Category
- Chemistry & Biology
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
Instructions:
- Cut the fan from its frame and remove the blades.
- Place the 2 magnets 1 next to the other and mark their upper side.
- glue the magnets on the fan, with the marked side facing the same direction. or use the bracket.
- Prepare the electronics.
- Glue everything in place with hot glue.
A list of what is needed:
- 120 or 80mm computer fan
- 12v power supply
- 5.5*2.1mm female connector
- 2x strong magnet with a diameter of 10mm and a height of 5mm
- Strong glue (like epoxy)
- (optional) 3 LEDs with a 1k resistor per LED, or a piece of 12V LED strip
- speed controller.
PWM is the best. simple transistor or LM317 circuit can also work, But I found that with the magnets it is difficult for the fan to start with low voltage.
Put the magnets like this and mark their upper side, then move them away from each other and glue them to the fan like this
timer 555 pwm speed controller. For the mosfet I used what I had but you can also use others
