Wackyvorlon writes – “This is a quick trick, not something to be done frequently. Mix up saltwater in a glass, and drop a nine volt battery in. The battery will electrolyze the water, producing two streams of hydrogen and oxygen. “ – Link. More: Splitting water! – Link. Electrolysis – Link. Hydrogen Fuel – Link.
Michael writes – “I thought I’d post the results of my first attempt at shooting fireworks, (thanks to the info I learned from the Make blog). I discovered that the smaller the aperature, the better, as it seems to keep the light trails thinner and more sharp-looking. Also, make sure your memory card is big […]
Michael writes – “Here’s how to photograph the Space Shuttle Discovery and ISS with a digital camera on a tripod.” – Link.
Rick writes – “This tutorial will explain how you can set up a Mac mini or other spare Mac to be a 24-hour spam filtering drone. The process utilizes Apple’s Mail application, IMAP email, and C-Command’s SpamSieve along with a few custom AppleScripts that will allow you to remotely train the Mac mini in the […]
Greg writes – “Should bring the racing car enthusiast/Lego ticker out in everybody. Fully operational lego racing car called the Zxero. Summary: 4 wheel drive, suspension, steering, electric motors, 3 speed, and 100% Lego. Cosmetic details include a turbo, spoiler, and rollcage.” – Link.
Monopole writes – “These Tazmainian hams transmitted voice over 104 miles between mountain peaks using Luxeon LED powered transmiters. The circuits and pictures of the rigs are described. Check out the old school handset being used. Of course they were dismayed that US Army Heliograph operators managed 183 miles over a hundred years ago (Morse […]
Here’s a *really* old guide to electronics (in web years that is) but there are a couple good starter items in there – “Are you a beginner in electronics? Have you been interested in electronics but never really taken the time to start learning? Are you just starting out but was unable to find any […]
