If San Francisco City Attorney Dennis Herrera gets his way a generation of club goers will miss out on the sickly sweet tang of caffeinated alcohol beverages like Sparks, Four-Loko, and Joose. Yet, all is not lost. A group of enterprising practitioners have seized the opportunity to handcraft a batch of Bathtub Sparks in an attempt to recreate the extreme libation.
My father recently drew my attention to an article in IEEE Spectrum about the so-called “Zink” printing technology commercialized by a group of former Polaroid employees. Zink, an acronym for “zero ink,” uses special paper with three layers of embedded dye crystals activated by heaters in the print head. Solely by controlling the temperature and duration of heat pulses delivered by the print head, the yellow, magenta, and/or cyan layers may be selectively activated. It is essentially a refinement of the black-only thermal printing technology commonly used, for example, in cash registers and label makers. By eliminating the requirement for ink or toner, Zink promises to produce dramatically smaller and more portable color printers, and has already been incorporated in several “digital polaroid” style cameras with integral photo-printers, such as the Polaroid PoGo Instant Digital Camera. [Thanks, Dad!]
Klaus Sedlbauer and Herbert Sinnesbichler, of Germany’s Fraunhofer Institute for Building Physics (IBP), think coffee is perfect at 58 degrees C. So they built a coffee mug that automatically maintains that temperature, tending to cool its contents above 58 degrees, and releasing heat below 58 degrees to warm them back up. It works by use of an interstitial phase change material (PCM, Wikipedia) between the aluminum fins, which has a solid-liquid phase change temperature of 58 degrees. Above 58 degrees, the PCM melts and absorbs heat, and below 58 degrees it freezes and releases heat. Supposedly it can keep a cup of coffee at ideal temperature for 20 to 30 minutes.
If that all sounds too complicated, don’t sweat. What I’m going to show in this tutorial is simply how to build a simple piece of apparatus that allows you to collect pure gas samples over water. You can collect carbon dioxide, oxygen, hydrogen–anything you can generate and direct down a hose.
Tim Saylor recently wrote in to me about the Gingery-style charcoal foundry he built for Chicago’s hackerspace Pumping Station: One. There’s a write-up here and a good Flickr set showing construction and use of the furnace to melt aluminum here, including some really pretty shots of the fire and sparks at night. [Thanks, Tim!]
Electron Beam Free-Form Fabrication (EBF3) is a rapid prototyping technology developed by Karen Taminger of NASA’s Langley Research Center. Dr. Taminger is prone to market EBF3 by analogy to Star Trek style “replicator” technology, which is nothing but shameless hype. Still, the basic idea is an interesting twist on extrusion-based 3D printing technologies (although there’s not really any “extrusion” going on), and is under development with an eye towards space-based fabrication. Working in outer space would eliminate the system’s major ground-based shortcoming, which is the requirement for maintaining a vacuum or inert atmosphere to prevent oxidation of the weld.
OK, my awesome meter has kind of overloaded on this one. Everett Bradford’s “Prometheus Device” is a hand-mounted appliance that shoots, like, real fire. It looks, you know, dangerous, and all, but it’s so cool I don’t really care. And he’s done a great job documenting the build, although obviously no one should attempt this who doesn’t know what they’re doing. Amazing work, Everett. Thanks!
