The Indestructible Concrete LED Lamp You'll Own For the Rest Of Your Life. Climbing Knots | How to Tie Climbing Knots | Animated Climbing Knots. Climbing Knots Welcome to Climbing Knots These animated knots are for climbers, rescue workers, arborists, tower-climbers, and others who use rope in man-carrying applications. Select the knots from: the index above left; the pictures above; or the Climbing Usage page.
Selection This selection is based on consultation with, and feedback from, many experienced climbers. Omissions The Overhand Knot and the Figure 8 Knot, which both underlie other Climbing Knots, are included in the Basics Section. Deaths Climbing, caving, etc., are challenging and dangerous. Climbing Ropes A climbing rope is typically about 60 meters, or 200 feet, long. Static ropes are more durable, more resistant to abrasion, and lack elasticity. Links Modern Alternatives Descent devices such as Brake Bar Racks and "8" rings are kinder to the Static rope and easier to manage than a Munter Hitch.
Learn Your Knots: The Life They Save May Be Your Own. Bring Dead Ni-Cad Batteries Back To Life. Make Your Own iPad. Instructables - Make, How To, and DIY. Build a Coke Can Stirling Engine. LED Reading Pad. Circuit Simulator Applet. This is an electronic circuit simulator. When the applet starts up you will see an animated schematic of a simple LRC circuit. The green color indicates positive voltage. The gray color indicates ground. A red color indicates negative voltage. The moving yellow dots indicate current. To turn a switch on or off, just click on it. If you move the mouse over any component of the circuit, you will see a short description of that component and its current state in the lower right corner of the window.
The "Circuits" menu contains a lot of sample circuits for you to try. Full Screen version. Directions. Standalone (offline) versions. Index of Circuit Examples.
A visit to the electronics markets of Shenzhen. I’ve just returned from a week long trip to Shenzhen, China in a “geek tour” trip organized by Bunnie Huang, with some assistance from the fine folks at PCH International. More than just a tour, this was also a tiny conference of open source and physical computing hardware hackers. The participants were (from left to right above): Jeevan Kalanithi, Eric Schweikardt, Bunnie Huang, Nathan Seidle, Leah Buechley, myself (Windell Oskay), Tom Igoe, and David Merrill.
(Thanks to Tom Igoe for the photo. Thanks also to Dale Dougherty for helping to get such a great set of folks in contact for the trip!) Shenzhen is a vibrant, bustling, young, and modern city of 8 million in southern China. For me personally, one of the most interesting parts of this trip was spending some time in the vast electronic markets of downtown Shenzhen. Here’s what the 2nd floor of the SEG market looks like a little while after opening– before it gets crowded. A typical vendor’s booth looks like this.