Math Monday: Linkages – Biomimicry. Written by Glen Whitney for the Museum of Mathematics In this installment we are branching out into the wider world of more complex linkages. See the Linkages series introduction for the MoMath Linkage Kit, an introduction, and general instructions. Given the incredible flexibility of the seemingly simple four-bar linkage, it should come as no surprise that more complex linkages can produce an essentially limitless array of different behaviors. Today, we’re going to look at some linkages designed to mimic the walking behavior of living creatures. They are designed to lift a strut up off the ground, plant it farther ahead, and pull it back (which is the power stroke that actually moves an object — or animal — forward.)
You can find lots of information about the Klann linkage at Klann’s website — and here’s a great video of an operating vehicle based on this concept: Now, compare that concept to the work of Theo Jansen, whose wind-powered linkages move entirely of their own accord: More: Replicator™ 2 Desktop 3D Printer. Spirals By Steve. Buckyballs | Buckycubes | The Amazing Magnetic Desktoy You Can't Put Down. X-Acto Deluxe Hobby Tool Set. MAKE. Congrats to MAKE pal Dino Segovis, who just published the 52nd and final project in his one-year Hack a Week series: This cool laser “oscillograph” that modulates an audio input across the beam from a green laser pointer using a linear actuator recovered from a junk hard drive.
A spinning mirror provides the time element. One thing I’ve always liked about Dino’s projects is that he reports his failures: What you tried that didn’t work is usually just as important, to yourself and to readers, as what you tried that did. But a lot of people skip it to save time and, perhaps, some element of personal embarrassment. Anyway: WTG, Dino! And thanks! Laser Oscillograph Related. K&J Magnetics - Strong Neodymium Magnets, Rare Earth Magnets.