Magnetic Stirrer

This DIY magnetic stirrer, I had 90% of the parts already in my house (only purchased the stirrer bars/pills). But If you don't have all the parts, they are all pretty cheap and you can purchase them on the links below.

Any 60x60x20 fan

7Pcs/set Magnetic Stirrer - Stirring Bar
http://s.click.aliexpress.com/e/EQ4kudlW

Cooling Fan Speed Controller
http://s.click.aliexpress.com/e/OKsaksiU

Magnets:
http://s.click.aliexpress.com/e/mckjfh4k

Switch:
http://s.click.aliexpress.com/e/