Friday, August 7, 2015

Quick, Easy & Cheap Homemade Magnetic Stirrer





Quick, Easy & Cheap Homemade Magnetic Stirrer & Magnetic Stir Bar.
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Quickly and crudely made with spare parts laying around in just a matter of minutes.

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Material used:
- 12v computer Fan Motor,
- Hard Drive Magnet,
- 2 Cylinder magnets as spin bar (I recommend purchasing one),
- Tupperware Bowl,
- Variable Power Supply*
* Can use just about any 5-12v power supply laying around - phone or razor charger, modem or electronics PS, etc. Just check the voltage and amperage of the motor you intend to use and compare it to the power supply. Anything over 0.5 amps likely will work.
Best to use less voltage than you motor is rated for or your spin bar may spin too fast. Add a voltage divider potentiometer or some other means to control speed if desired.

I plan to build a self contained unit with speed control & likely hot plate in the near future. This was just a quick build because I needed one right then.  

Spin bar has since arrive in the mail and I have wired the magnetic stirrer to a 5v 1amp modem power supply and it works very well.




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