Britons John Bryant and Chris Sangwin have written a book called How Round is Your Circle? that looks incredible. I haven’t read it (yet), but the promotional website by itself has me sold already. Highlights include Reuleaux tetrahedra, square-hole drilling, and self-righting polyhedra.
If you are curious about the technical details of designing and laying out gears and gear trains, you can download a complete, free, public domain copy of the 1922 edition of the American Machinist Gear Book from Google Books right now.
Two used units, anyway. You need to move quickly if you want the cheap one for $23.99:
Cracked casing. Has caused dog to grow third pair of legs. Still adorable. Good product.
Because after that one’s gone, the price jumps up to $2500:
Found this in some old abandoned village while on vacation. Older, Russian model (PU239)? Please inquire about shipping. Not responsible for damage due to radiation or explosions.
Or you could just visit the manufacturer’s website and buy it there.
And no, it’s not a joke, but you wouldn’t know it from reading the reviews on Amazon. The 168 reviews are, in fact, the best reason to check out the listing. Highlights include:
So glad I don’t have to buy this from Libyans in parking lots at the mall anymore.
I bought this to power a home-made submarine that I use to look for prehistoric-era life forms in land-locked lakes around my home town in Alaska. At first I wasn’t sure if this item would (or could) arrive via mail, but I was glad to see it showed up with no problems. Well, almost no problems.
Great Product, Poor Packaging
I purchased this product 4.47 Billion Years ago and when I opened it today, it was half empty.
I bought it for my cat
I bought this for my cat and put it with a flask containing poison, in a sealed box. Do you think he likes it ? I’ve not opened the box yet.
Mackenzie Cowell is one of the founders of DIYbio.org. He is featured in the most recent of our ongoing series of video interviews with notable makers, sponsored by Dow chemical, over at elementsofhumanity.com. Mac is a big advocate, not just of the fledgling discipline of synthetic biology (or “biological engineering,” as it’s coming to be […]
Boutique Cycles is a site out of Australia featuring user-submitted pics of tricked-out custom bicycles. Shown above, “Glowing Batavus” fixie by Netherlands user Kars, with an antique frame, Miche hubs, and custom-painted rims. The frame glows in the dark.
On Noah Zerkin’s blog, he has a round-up of augmented reality (AR) project videos that have been floating through the aetherweb in the last few months. In the above vid, Aaron Meyers and Jeff Crouse, both involved with Eyebeam, the OpenFrameworks community, and interactive art in general, explain to RocketBoom their “World Series of ‘Tubing,” […]
Simon Kirby sends word of a hot new group destined for stardom and driven by solenoids. Ladies & gents, put your hands together for – Cybraphon! […] a robotic orchestra in a large display cabinet, inspired by 19th century automata. The unusual feature of Cybraphon is that it is emotional. It’s mood is shaped by […]
