DIYBio has become a big thing lately. Especially with builds like the Pearl Gel Box which literally costs a fraction of what a "scientific" labeled unit would cost. Having access to cheap and easily assembled devices to do garage science really does enhance the whole science community in my opinion. One reason why I think garage science is a good thing is that most people in the hacker space that do garage science like to communicate about what they have done, hence the need for a site like Instructables. Open communication is crucial for science to progress as I am a firm believer that progress is dictated by communication. And, if progress is to succeed, communication must be open. So, thanks to all those that participate in tinkering and are willing to share those endeavors. Scientists could learn something from the community at Instructables.
This build is cheap, easy and voids lots of warranties. With that said, do be careful with this build.
The video of this in action is not embedding properly so a link to it is here.
Update 02-02-2011: Attempting to embed the video again. If you can't see it, use the link above.
Step 1: Tools and materials
1x Modified Computer Power Supply
1x Electric Griddle
1x Computer Fan - Hopefully salvaged from the same computer you got the power supply from.
1x DC Motor Controller
1x Rare Earth Magnets
1x Stir Bar
Beakers and the like to do your science in.
2x Banana plugs - Any color. I'm partial to the Emerson / Johnson brand.
4x Banana jacks - Any color. Again, I like the Emerson / Johnson brand.
4x 4-40 Screws
2x Banana Cables - Any color.
1x Soldering Iron
1x Wire Stripper
1x Diagonal Cutters
1x #1 Phillips Head Screwdriver