- Computer Fan
- Small Circular Magnets
- Bucky ball magnets
- Plastic CD Cases
- Plastic nuts for a screw(Plastic so it doesn't interfere with magnets)
- USB Cord (Can be from an old mouse, keyboard, or anything with a male USB on it.)
- Spray Paint (Any color but I used black)
- Hot glue
- Soldering Iron, and solder
- SPDT switch
Many of these materials are available at Radioshack such as the magnets, switch, and computer fan.
Here is a video of the final product:
Step 1: Add Magnets and Make Spinner
To make the spinner you need some small magnets, preferably spherical, to wrap in a thin layer of moldable plastic. I got a cube of spherical magnets for Christmas last year, a bucky ball-type magnet, and I took some to test as the spinner. For me, 4 of the bucky balls worked the best and spun in the water perfectly. So then once I knew they would work I melted some polymorph and tried multiple times to get the right amount of it. The best worked when I had a very thin amount of the polymorph and wrapped it around the four magnets. This caused the best spin, least noise, and biggest whirlpool in the cup.
Refer to the images for more information on putting it together.
Step 2: Making the Connections and the Switch
This is USB powered but I have not yet tried plugging it into my computer. I have been using an apple USB charging cube to power it. If you use it on your computer I am not responsible for any damage done to the device or the computer, if any is done. Be careful in making sure that your connections are put together correctly so there aren't any shorts.
Step 3: Making the Outer Case for the Fan
If it does work and the whirlpool is visible, you can add some vegetable oil to the water in the cup and let it sit until it is all rested at the top. Then turn on the fan and the whirlpool will be even bigger and more visible.