I’ve been seeing this “zig-zag” living hinge technique all over the web since we covered snijlab’s apparent invention of the method six weeks ago. “Snijlab-style living hinges” is kind of a mouthful, and since it looks like the idea is here to stay, I humbly offer “sninges” as the obvious, handy portmanteau.
Anyway, we’ve covered designs using sninges a couple times, already, but so far I haven’t seen much detailed discussion. Enter Make: Projects user Kevin Gunn, who’s just published this handy guide describing his own experience, to date, with designing laser-cut sninges in 1/4″ acrylic. [Thanks, Kevin!]
Our latest Weekend Project is a great lesson in turning a cheap consumer product into a magical maker device. Mystery Electronic Switches converts an electronic holiday greeting card with LEDs (along with the aide of a couple magnetic reed switches and various other components) into a portable gadget and magic trick that will both astound and confuse whomever you challenge to turn this device on. The secret (Spoiler Alert!) lies in the use of a magnetic ring, which in combination with the reed switches, allows you, and only you, to complete the circuit. The physical Single Pole Double Throw (or “SPDT) switches mounted to the exterior of the chassis must also align to allow voltage to pass through correctly. Just to confuse your audience, we’ve installed a dummy switch in the middle – feel free to use this to further confuse any challengers who think they might have figured out the sequence.
The exact card you hack will vary, but the premise remains the same. The circuit is turned on when the card is opened, so this function is replaced by toggle switches. Once you’ve located the trigger on the greeting card’s circuit board (pictured above), you will know where to connect all of the additional circuitry (see schematic below). Then you package it all up in your own chassis – in our demo we used a clear plastic deodorant container. This looks cool and will awe your audience when you perform your “magic.” They won’t be looking at your hands. Instead they’ll be looking for something to be happening inside. Meanwhile only YOU know the secret!
Sign up below for the Weekend Projects Newsletter to access the projects before anybody else does, get tips, see other makers’ builds, and more.
Sign Up for the “Weekend Projects” Newsletter
Our favorite “mathemusician” Vi Hart has a wonderful new video out today exploring my favorite polygon, the triangle. I loved the comment on her Facebook posting of the video: “This just made my day infinitely better. Thank you for being you.” I couldn’t agree more.
Tell us a bit about yourself
Why do you like making things?
Can you tell us something about the Gigantic Bubblebot project that you made for MAKE?
What kind of things do you dream of making?
Can you tell us about one of your favorite tools?
See videos of Zvika’s other creations:
MAKE Volume 28, Toys & Games!
MAKE Volume 28 hits makers’ passion for play head-on with a 28-page special section devoted to Toys and Games, including a toy “pop-pop” steamboat made from a mint tin, an R/C helicopter eye-in-the-sky, and a classic video game console. You’ll also build a gravity-powered catapult, a plush toy that interacts with objects around it, and a machine that blows giant soap bubbles. Play time is a hallmark of more intelligent species– so go have some fun!
When you get right down to it, “transilluminator” is just a fancy name for “light box.” The device used in molecular biology typically has a UV source inside, but fundamentally, it’s just a box, with a lamp in it, with a translucent top.
However, for viewing gels in molecular biology, the higher energy, shorter wavelength UV bands are more useful, and these do carry some exposure risk. Which is why laboratory “transilluminators” are a bit more specialized, with safety features designed to prevent operators from getting a face full of UV-B or UV-C every time they look at a gel. Like a lot of laboratory-grade scientific equipment, however, new transilluminators from “major brand” manufacturers are often shockingly expensive, considering what’s actually under the hood.
DIY designs offer a low-cost alternative, but it’s nice to find one, like this offering from Instructables user jorodeo, that does not force you to compromise much on either utility or safety. The bottom and sides of the case are made from 1/4″ laser-cut black acrylic. It houses a combined ballast and lamp holder with a 312nm (UV-B) fluorescent bulb and a piece of Hoya U325-C filter glass to block visible light. The top is made from a 1/8″ piece of special UV-transmitting acrylic called Solacryl, and is fitted with a hinged UV-blocking safety filter made from conventional, clear, cast acrylic. You can see the visible light from the fluorescent compounds in the gel just fine, but the harmful UV does not reach your eyes or skin.
Rich Olson built this ducted fan bike using model airplane motors and an Arduino:
[Via Hacked Gadgets]
To celebrate the release of our latest publication, the Make: Ultimate Kit Guide 2012 (and its companion website), we’re giving away at least one of the cool kits reviewed in the issue each day during the holiday season.
To be eligible for today’s giveaway, all you have to do is leave a comment below in this post. The entry period for today’s prize will be until 11:59pm PST tonight. We’ll choose one person at random, you’ll be notified by email, and you’ll have 48 hours to respond. The Winners List is kept on the Giveaway landing page. That’s it! No purchase necessary or anything else to do. Please leave only one comment per post. You can enter as many giveaways as you like until you win. This giveaway is for US residents only. You also must be 18 years old to enter (Kids: Ask your parents to enter). See the Kit-A-Day Giveaway landing page for full sweepstakes details and Official Rules.
Important Note: If you enter this drawing, when it’s over, please check the place where you registered to comment (eg. Facebook, Yahoo, Twitter). Some people are winning these kits and then not responding when we send them a message using the available means of contacting them. We want to make sure you get your giveaway!
For ages, mankind has looked to birds for inspiration for flight. The Gakken Ornithopter Kit from the Maker Shed lets you discover flight powered by flapping wings, just like a bird or insect. The detailed kit includes over 40 parts that you assemble into an ornithopter (Greek for ornithos “bird” and pteron “wing”) and an entomopter (Greek for entomo “insect” and “pteron” again). Learn about flight just as you’ve seen it in nature. Booklet is in Japanese with highly detailed, step by step, assembly images.
I’ve been enjoying the blog posts by Ian Lesnet of Dangerous Prototypes as he visits Japan, including gotta-do-it stops at Tokyo Hackerspace and Akihabara Electric Town. He also attended Make: Tokyo Meeting 07, the Japanese equivalent of Maker Faire. Lots of cool stuff going on over there! (The project pictured is a DIY cotton candy maker!)
|Your requested content delivery powered by FeedBlitz, LLC, 9 Thoreau Way, Sudbury, MA 01776, USA. +1.978.776.9498|