Science’s 10 most beautiful experiments
I think the Double-slit electron diffraction is my favorite – “Robert P. Crease, a member of the philosophy department at the State University of New York at Stony Brook and the historian at Brookhaven National Laboratory, recently asked physicists to nominate the most beautiful experiment of all time. Based on the paper of George Johnson in The New York Times we list below 10 winners of this polling and accompany the short explanations of the physical experiments with computer animations.” Link.
“A speed trap measures the timing of events or speed of projectiles “This is a very affordable and simple to build speed trap based on the PIC 16C84 microcontroller. The goal was to use as few parts as possible while adding as many useful features as possible.” 
Interesting way to provide localized power sources – “The Toyota Prius – Gasoline-electric hybrid vehicles can serve as a UPS (Uninterruptible Power Supply) for your house. The Prius, unlike the generator, also has a battery that provides instant, UPS-like power, to your house. Careful research has shown that most people would prefer not to go outside to manually pull a cord in the case of a power failure.” Tons of information, photos and how-to info… Thanks RobK123! 
Nice bike – “What does a propulsion engineer do when he wants to experience the power of a rocket without going to space? He simply bolts one to a bike. How It Works – 1. A toggle switch on the battery pack arms the ignition system. 2. The left-thumb button sends power from the battery pack to an igniter on a model-rocket motor inside the rocket engine, vaporizing the roofing-tar fuel so it can burn. 3. The right-thumb button keeps the nitrous oxide flowing (and the rocket lit) as long as it’s pushed. 4. The left brake lever regulates the flow of nitrous and throttles the rocket.” 
Neat how-to and video from Troy…“This is my hydrogen generator that I built Using stainless steel switch plate covers. You may be asking, Why switch plate covers? Well in the area I live in I was having trouble finding Someone to sell me a sheet of stainless steel and cut it for me. So I was in the Home Depot (a local hardware store) And I ran across switch plate covers made of stainless steel. All cut to size and all uniform. Well this made it too easy for me so I bought them About 36 @ $1.24 ea. I thought it was kind of expensive but what the heck. I was not getting the generator built waiting for a deal to drop in my lap. So on to the building of the h2 generator.” Thanks Jason! 
Tim used our how to on using the Kodak Wi-Fi camera with Flickr and writes in “Thanks for your help. I followed the instruction on your post on the MAKE blog, but was having trouble getting the Automator application I created to work. When I tried it as a stand alone Automator application, it would not work. When I ran it from within Automator it worked. I noticed that software update was telling me about some new updates. I ran them and then restarted and now it works fine. Don’t know if it was the updates or just restarting, but now it works well. Thank you for your help with this.” 
Nice Instructable from Maxwell – “An easy DIY project to add ground effects lights to your bicycle or other means of conveyance, utilizing inexpesive and commonly available cold-cathode lights. They look cool, and really do increase your visibility at night. Since putting them on my tallbike everone is asking to take my picture.” 