Scotch Tape Lets You See Through Frosted Glass

There’s probably no better tool in the gadgeteer’s box than a roll of Gaffer Tape (or duct tape, if you don’t mind sticky or crumbly residues). But what about its humble household cousin, Scotch Tape? Traditionally used for wrapping gifts or taping broken spectacles back together, it has another amazing talent. It can let you see through solid objects.

If those solid objects are in fact sheets of frosted glass. If you have a frosted window that you need to take a peek through, tear off a strip of tape and press it down firmly onto the pane. The roughened, opaque surface is transformed into a smooth, shiny one, and the light that was previously scattered into vague suggestions of shape and color now comes through sharp and clear:

I’m amazed we never saw this trick in a MacGyver episode.

Weird Tape Effect [YouTube via Core77]

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Tiny Crossbow Still Dangerous Enough to Be Awesome

This tiny crossbow probably packs enough power to fell a tiny elephant

This miniature crossbow is the weapon that Captain Nemo would have used, if he had used tiny, finger-sized weapons. The Mini Crossbow, made by T. Shamir, is fashioned from sterling silver and 22k gold, with the string and bow made from steel. But enough talk. Here it is in action:

As you can see, it is both powerful and scarily accurate. That alone would be enough to make it the most awesome miniature weapon I have seen this week, but Shamir had to go one better. Or perhaps two better: he added a couple of extra arrow types to his quiver.

Along with the basic steel-tipped aluminum arrow, he made ramming arrows, with a square head, suitable for smashing brittle things like windows, and the amazingly dangerous flare arrow, which lights up like a sparkler and carries its deadly flame to the target.

Of course I want one. Sadly, I’ll probably have to spend hours and hours designing and testing my own, as Shamir has made just one and isn’t selling it. Now where did I put that Dremel?

Mini Crossbow Shooting Targets [YouTube via Make]

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Mouse Hacked to Run On Rechargeable Cellphone Battery

Davetech’s mod puts an old cellphone battery inside a mouse

Just as a bike tire will always burst when you are far away from home without a patch kit, your mouse will run out of juice just as you are up against a deadline. But what if you could just attach a pair of jumper leads and get the dead rodent running again? And better still, what if you got rid of the AAs altogether and swapped in a long-lasting lithium-ion battery instead?

This is exactly what Davetech did over at Instructables. Using nothing but a trusty Dremel (what else?), an old cellphone battery, a card reader and a cheap-o ($1.50) li-ion battery charger from Ebay, he fashioned a clever rechargeable mouse. Oh, and you’ll need pair of jumper cables, too, if you want to follow along at home.

The Dremel was used to hollow out the old battery compartment and make room for the new Nokia cell. The card-reader was cannibalized for its sprung contacts, with all but two of these bent out of the way. To begin with, Davetech would just swap in a new, freshly charged cell and pop the old one into his phone to recharge, but even these few seconds were too much.

To allow in-mouse charging, Davetech ordered the charger from Hong Kong and now simply runs a pair of cables from its terminals into the mouse and onto the battery’s own contacts.

I think the best mouse designs are those that have their own li-ion cell inside and can be charged whilst in use using a USB cable, but I do have a newly acquired Dremel in the tool-closet. The trouble is that I tossed my mice for a pair of Apple Magic Trackpads (one for each hand), and no matter how clever I get with the chopping and carving, there’s just no space in their skinny bodies for even the thinnest cellphone battery.

Modified Mouse Runs on Lithium Ion Cellphone Battery [Instructables]

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Robogames 2011: Flame Throwers, Rocket Launchers and Endless Robot Mayhem

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Texas Heat Lighweight Robot


Walking into the arena, the first thing you notice are the noises: booming, clanging, the sound of metal crashing upon metal a short distance away. Followed by the smell of flames and burning rubber.

Welcome to Robogames.

Robogames is an annual robotics competition that features more than 50 different events, including combat, sumo, hockey and mech warfare. Dubbed “the Olympics of robots,” this year’s event took place April 15 to 17 in San Mateo, California, with a colorful array of robots in attendance.

The three-day event has much to see and learn, with electronics, robotics and educational-toy distributors’ booths lining the path to the back of the auditorium, where the largest fighting stage is located. The completely enclosed structure separates spectators from the carnage within by a scratched-up sheet of Lexan polycarbonate over aluminum support beams. Other competition areas included a maze, a mini soccer field and a smaller, enclosed “ComBot” stage with four 2-foot tall buildings. And of course, plenty of bots were just mingling with the public.

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IPhone Horn Speaker Made from Old Trumpet

Chris Locke's Analog Tele-Phonographer gives your iPhone the horn

If steampunk wasn’t, like, totally over, then we might be tempted to use the label for this iPhone speaker dock — fashioned from brass, cogs and tubes. As it is, we won’t insult Christopher Locke’s amazing “Analog Tele-Phonographer.”

As you quite clearly see, the horn speaker is fashioned from an old trumpet and a selection of discarded machine parts. We have seen horn speakers for cellphones before, but never one that used an actual trumpet. Since the horn is likely the hardest part to make yourself, this is a rather sensible design decision.

So how does it sound? Well, it’s hard to say, as I’m listening to the video soundtrack through my MacBook’s speakers. What’s clear is the before-and-after difference as the iPhone is dropped into and lifted from the dock. The sound which is channeled through pipes and horn is certainly louder and clearer than from the iPhone’s speaker alone.

Have a listen:

Chris will sell you a trumpet speaker for $400. I’m not sure I have the space for such a thing, but it sure would match my brass typewriter-style keyboard, my Pac Gentleman game and my Victorian-style 3D spectacles.

Analog Tele-Phonographer [Heartless Machine]

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Hack Allows iTunes Music Streaming to Any Device

Deconstructing the Airport Express. Photo: Steve Jurvetson/Flickr

Programmer James Laird wanted to help his girlfriend stream her iTunes music in her new house, so he hacked away at Apple’s private key for streaming music, reverse-engineered the script, and made it available to the public.

Laird calls his open source Perl script Shairport, which lets hardware and software receive AirTunes music from iTunes.

Apple uses a public-key encryption scheme for AirTunes streaming. This lets anyone encrypt and stream audio to the AirPort Express (or other compatible device), but iTunes would only stream to Apple devices. Now, with Shairport, iTunes can be tricked into streaming audio to anything at all.

Laird did this by cracking open the AirPort Express (literally), dumping the ROM and then searching around for the private key. Apparently this was easy to find, as Apple had hidden the private key “in the ROM image, using a scheme that made the de-obfuscation code itself stand out like a flare.” He then cracked the crypto and now has the key.

This is combined with an ALAC (Apple Lossless Audio Codec) decoder to make a small package that can be installed on computer. It’s unlikely that hardware manufacturers will risk using this solution, but it’s easy to see how a home user could install it on an unused computer or even a Linux-based router.

That means we’ll likely see some third-party programs taking advantage of Shairport. For example, someone might make an app for the Xbox 360 capable of streaming music from iTunes on your PC. Or, say you have a MacBook Air and want to stream music to your friend’s iMac — Shairport makes this possible.

When up and running, the Shairport machine shows up as a regular AirTunes share in iTunes, or on your iPad or iPhone, and works just as you’d expect, so Laird’s girlfriend can use it just like her old AirPort Express.

I wonder: Will Apple will close this hole? It seems pointless to do so, as this hack will likely only be used by intrepid hackers such as you, dear Gadget Lab reader. Still, with Apple, you never know.

ShairPort 0.01 released [Mafipulation via Hacker News via Apple Insider]

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Rideable Hub-less Bike Actually Works

You know all those hub-less wheels that “designers” like to throw onto their CG concept bicycles? Well, a student of Loughborough Design School in England has actually made one. He even threw in a belt-drive for good measure.

It’s called the Lanartic, and it was designed and built by Luke Douglas. Despite being having a full sized wheel, the wheelbase is much shorter than that of a regular road bike, and because the seat sits over the rear wheel the seat-to-handlebar distance remains similar to a bigger bike.

The hubless design opens up a lot of extra opportunities, not least of all luggage carrying. You could put a bag or basket inside that rear wheel (taking care to keep it away from the rider’s heels) and it would put the load at or even below the bike’s center of gravity for a very stable ride.

I imagine the friction of this kind of wheel is a lot higher than that of a regular hub, thanks to so much more contact between wheel and the “frame”. It looks like crazy fun to ride, though, and wheelies should be dead easy with the seat so far back over the rear wheel.

Lanartic [Loughborough University via Doobybrain and Make]

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Real Möbius Gear Will Melt Your Mind

Stare at this bewildering Möbius gear for long enough and your brain will explode.

This Möbius gear is absolutely mind-bending, and almost impossible to describe. It’s a toothed gear that only has one side, made by Berkeley robotics student Aaron Hoover using various 3-D printing methods. He was puzzling over an animation of such a gear in action and convinced himself that it could be made in real life. He turned out to be right.

The white section is the Möbius strip and is flexible. It is made from silicone rubber, and has a twist, which means that — despite what your eyes and brain are telling you — it only has teeth along one side (because it only has one side).

The outer, black strip has a double twist that I still can’t make out after letting my eyes follow it around for a good 10 minutes now. Somehow, the little blue rubber “spur” gears guide these two impossible shapes and allow them to mesh. In theory, either the blue gears (planets, as this is essentially a planetary gear system) or the white “sun” strip can drive the movement. In practice, it’s easier to move the white strip by hand, and even then, the blue gears pop out occasionally.

I’m finding it hard to tear myself away from this picture, but I managed it for long enough to read Hoover’s detailed description of the planning and printing process (.pdf) from start to finish. It, too, is almost impossible to understand for a layman like me, but reading the nightmarishly complex calculations needed to make the gears line up makes this deceptively simple model seem even more impressive.

The Möbius Gear Photo: Berkeley Robotics. Thanks to Aaron Hoover on Neatorama.

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Wall-Mounted, Water-Cooled Wii Kicks Your Console’s Ass

The Wii UNLimited Edition Case Mod ditches the traditional white case for a cyber-styled CNC-milled one

Gaming consoles are pretty generic looking: White or black plastic, and relatively rectangular in shape. Martin Nielsen, a case-modding visionary, took the tired old Wii console and transformed it into the Wii UNLimited Edition, an almost unrecognizably epic acrylic and aluminum contraption.

Never mind the underpowered console inside. The case is made of CNC-milled aluminum. Dual 22 cm coolant reservoirs housed on either side of the Wii UNLimited Edition feed cerulean-tinted liquid to cool the main console through a series of tubes. A water pump is housed at the base of the left reservoir. The front of the case is see-through, so you can see the inner workings of the console.

To ensure overheating doesn’t occur, there’s a digital thermometer that sits on top of the structure, and discs are top-loaded through a slot. As an added touch, the Wii logo was machined onto the aluminum side panels.

The entire shebang is wall-mounted, displaying that previously unremarkable Wii console as a futuristic work of art.

If I had the time (and the skills), I’d style all of my consoles and boring looking electronics like this. It’d be like living in a sci-fi, steampunk space ship.

Mother of All Wii Mods, UNLimited Edition [Case Mod Blog via Slashgear]


Jailbreakers Release iOS 4.3.1 Hack for iPhone, iPad, Apple TV

Hackers have cracked opened the latest version of Apple’s mobile operating system to install unauthorized apps on the iPhone, iPad and iPod Touch.

Available from the famous Dev-Team jailbreakers, the iOS 4.3.1 exploit will work on most iOS devices, excluding the Verizon iPhone and iPad 2. That includes:

  • iPhone 3GS
  • iPhone 4 (GSM/AT&T)
  • iPod Touch, third-generation and fourth-generation
  • iPad, first-generation
  • AppleTV, second-generation

Most customers primarily jailbreak their iOS devices to install Cydia, an underground app store serving unauthorized software. Especially popular in Cydia are utilities to enable free tethering to share an iOS device’s 3G internet connection with other devices. However, be forewarned that AT&T recently started cracking down on free tethering users, warning them that they will be charged if they don’t sign up for a legitimate tethering plan for at least $20 per month.

Owners of the Apple TV 2 will probably be jailbreaking their devices to install XBMC, an app that enables playback of almost every type of media file, including 1080p high-definition Blu-Ray rips. XBMC also enables customers to install add-ons for widgets, so it’s basically a mini app store for the Apple TV.