Amp Your Ride
Electrical work wasn't my expertise, so I had to teach myself how to build circuits from the ground up. I'm now on version three of my two-port USB generator, which is about 70 percent efficient above 12 mph and creates less drag on bike wheels than other designs. With the right equipment, you can build one yourself.
Going with the Wind
Ed Lenz's house is pretty hard to miss-it's the one with a home-built vertical-axis wind turbine on the roof. A career tinkerer, Lenz put the turbine up there for a test run three years ago, and it's still turning away today, a super-quiet model of efficiency and ingenuity. The "Lenz2" turbine, built primarily from easy-to-find supplies like aluminum, plywood and magnets, can produce about 50 kilowatt-hours of electricity per month with steady wind. Its output-about 10 percent of the total…
Build a Pocket Theremin on the Cheap
digg_url = 'http://digg.com/general_sciences/Fun_Pocket_Theremin'; Even if you're not familiar with the Theremin itself, it's very likely you've heard its loopy electronic tones before. Remember those spooky sound tracks from 1950s science fiction movies? Well, chances are pretty good that those oscillating noises were generated by a Theremin. Designed by Russian physicist Leon Theremin circa 1919, the two-handed instrument was one of the first ever electronic musical instruments and the…
Genius! DIY Apple Cider Press
Few things say autumn more than fresh apple cider. So what if you could make your own from your backyard. That’s what Instructables user Mike Craghead and his friend John Saveliff set out to accomplish. And the execution of this DIY project is absolutely genius! Want to make your own? Read on to learn from Mike […]