concertina226 writes "Called the Raspberry Pi 'hack day', the competition will pit 100 entrants against one another in a number of categories using only the board, Internet access, soldering irons and as much coding as they think appropriate. Participants will have 24-hours to complete projects, at the end of which winners will be awarded from a variety of prizes including camcorders, Android tablets and the geek must-have, the Hubsan H107 Quadcopter."

An anonymous reader writes "Developers been working hard for the past few months to get Linux ported to the TI-Nspire calculator. The port is not yet fully stabilized nor quite ready for broad consumption and requires some user-level knowledge of Linux systems, but is definitely worth a try. Experimental support for root filesystem installed on USB mass storage is being worked on, so that Datalight's proprietary Flash FX/Reliance filesystem used by TI's OS isn't a limit anymore. This also means that the native TI-Nspire OS image is not replaced by the Linux system, and Linux can been booted on demand. Support for USB keyboard, X server, directFB, Wi-Fi (with the help of a powered USB hub) and text-based Internet browsing is progressively being added and tested."

Hugh Pickens writes "Josie Garthwaite writes that old electric car batteries degraded below acceptable performance levels for autos still have enough life to serve the grid for at least ten years with a prototype announced by GM and ABB lashing five Chevy Volt battery packs together in an array with a capacity of 10 kilowatt-hours — enough to provide electricity for three to five average houses for two hours. 'In a car, you want immediate power, and you want a lot of it,' says Alexandra Goodson. 'We're discharging for two hours instead of immediately accelerating. It's not nearly as demanding on the system.'" (Read on, below.)

An anonymous reader writes "Google's Nexus 4 sold out around the world very quickly this week, and while there was talk of very limited supply, apparently some key people managed to get their hands on it. That's right: the Nexus 4 has already been rooted."

An anonymous reader writes "The team behind CyanogenMod, one of the most popular community-driven, Android-based operating systems for phones and tablets, has announced that they're moving to Cyanogenmod.org after their .com domain was held ransom by a community member. He had been in control of the .com domain name for some time, but the team found out he was impersonating Cyanogen to make deals with community sites. When they removed his access to other parts of the CM infrastructure, he demanded $10,000 to relinquish control of the domain and threatened to change the DNS entries. When they refused to pay, he went through with it. The team is now disputing control of the domain with ICANN. They said, 'We will continue to be open about the what, when, how, but unfortunately, we may never know the "why" – though greed comes to mind. The team itself has not made a profit off of CM and that is not our goal. But to have one of our own betray the community like this is beyond our comprehension.'"

Penurious Penguin writes "Via LXer, an article from PCWorld describes the A13-OLinuXino, produced by OLIMEX. Similar, but distinct from the Raspberry Pi, the Linux-powered OLinuXino is touted as 'fully open,' with all CAD files and source-code freely available for both personal and commercial reuse. Its specs include an Allwinner A13 Cortex A8 1GHz processor, 3D Maili400 GPU, 512MB RAM, all packed into a nano-ITX form and fit for operation in industrial environments between -25C and 85C. The device comes with Android 4.0, but is capable of running other Linux distros, e.g., ArchlinuxARM."

"Reverberation is the persistence of sound in a particular space after the original sound is produced," says Wikipedia. More often than not, in studio recordings reverb is added digitally; virtually every FOSS or proprietary sound-editing program has a built-in reverb utility. But what if you're the sort of purist who prefers the analog sound of vinyl records to the digital sound of MP3s or CDs? What if you're the kind of musician who records at the original Sun Studio in Memphis to get that original rock and roll sound? That may be overly picky for most musicians, but there are some who would rather sound like Johnny Cash than Flavor Flav, and they're the ones who are going to insist on real analog reverb instead of twiddling a setting in Audacity. There are many types of analog reverbs, of course. One of the purest types, preferred by many audio purists, is the adjustable plate reverb, and Jim Cunnigham's Ecoplate is considered by many to be the best plate reverb ever -- which brings us to Mike Storey, who wanted an Ecoplate-type plate reverb so badly that he spent eight months building one. He'll run your audio files through it for a (highly negotiable) fee, and maybe give you a bit of advice if you want to build your own, although his biggest piece of advice for you (at the end of the video) to think long and hard before you become a home-brew reverberator, with or without advice and components from Jim Cunningham.

An anonymous reader writes "4 years ago I read about experimental targeted muscle reinnervation (TMR) surgery on Slashdot. 3 years ago I crashed my motorcycle and had my leg amputated — at which time I had TMR done. Today I climbed 103 floors of the Willis Tower in Chicago with a experimental prosthetic using TMR. Thanks, Slashdot."

First time accepted submitter spanner888 writes "The first Shanghai Maker Carnival was held this weekend in conjunction with a Creation Exhibition, an arts and crafts expo with about 200 exhibitors. Makers attended from Shanghai, Beijing and Shenzhen and visitors came from around China. More photos are in this post, and videos in this one. Other photos can be found in this thread." I like the video that appears to show a smartphone's camera being used as the basis of an input device for a laptop; can anyone out there better explain it?

jjp9999 writes "By using the same technology found in older modems, Thomas Tumino, vice president of the Hall of Science Amateur Radio Club, has invented an iPhone interface for ham radios. He told The Epoch Times, 'Today there are iPhone apps where you can use the systems in the phone — and its sound card, which is being used as a modem ... And then you connect that into your radio with an interface like this, that just isolates the telephone from the radio, and then you can do all sorts of things.'"

antdude writes "Pumpktris is a fully playable version of Tetris built into a pumpkin, with 128 Light Emitting Diodes (LEDs) for the display and the stem serving as a game controller."

First time accepted submitter icepick3000 writes "There are probably many digital photoframes unused these days laying around. Mine is from the first generation meaning you can only insert a compact flash card and display photos. Newer models nowadays can display weather, news, and stocks. Anyone have some good idea's how to give these old frames a second life? I have been thinking about compact flash cards that support wifi... maybe someone has a better idea?"

An anonymous reader sends this quote from Wired: "Affordable 3-D printers and CNC mills are popping up everywhere, opening up new worlds of production to wide ranges of designers. However, one major tool still hasn’t received a DIY overhaul: the laser cutter. Maybe people are sensitive because Goldfinger tried to cut James Bond in half with one, but all that changes now with Patrick Hood-Daniel’s new Kickstarter, 'Build Your Own Laser Cutter.' ... A 40-watt laser tube and power supply means it can cut a variety of materials: wood, plastic, fabric, and paper. ... There is one major red flag, however. The machine’s frame is built from of Medium Density Overlay (MDO) — a type of plywood. Hood-Daniels says this is a feature, making the blackTooth less sensitive to thermal distortion and inaccuracy than a metal frame, but it also creates a serious, fire-breathing concern. ... When asked for comment, Hood-Daniel says 'Initially, I had the same thoughts as to the precarious use of wood for the structure, but even with long burns to the structure which were made on accident when starting a run, there was no ignition.'"

paroneayea writes "MediaGoblin and LulzBot have teamed up to bring 3-D model support to MediaGoblin! The announcement shows off a live demo of the new feature... it uses Blender on the backend to render stills and thingiview.js to show realtime WebGL previews. This means MediaGoblin is becoming more useful for 3-D artists and people interested in 3-D printing, especially those looking for a free-as-in-freedom alternative to Thingiverse."

mikejuk writes "After six years in the making, the Arduino Due is finally becoming available and, with a price tag of $49, is bound to give a boost to the platform. The Due, which means 2 in Italian and is pronounced 'doo-eh', replaces the 8-bit, 16MHz Uno by a 32-bit, 84MHz processor board that also has a range of new features — more memory, a USB port that allows it to pretend to be a mouse or a keyboard say, 54 I/O pins and so on — but what lets you do more with it is its speed and power. The heart of the new Arduino Due is the Atmel SAM3X8E, an ARM Cortex-M3-based processor, which gives it a huge boost in ADC performance, opening up possibilities for designers. The theoretical sampling rate has gone from the 15 ksps (kilosamples per second) of the existing boards, the Arduino Uno, Leonardo, and Mega 2560, to a whopping 1,000 ksps. What this all means is that the Due can be used for much more sophisticated applications. It can even play back WAV files without any help. Look out for the Due in projects that once would have needed something more like a desktop machine."

In an effort that took four months and $2000, instead of the quarter million dollars and two years they estimate it would have using conventional design methods, a group of University of Virginia engineering students has built and flown an airplane of parts created on a 3-D printer. The plane is 6.5 feet in wingspan, and cruises at 45 mph. I only wish this had been sponsored by Estes or Makerbot rather than the MITRE Corporation; it would be great for every high school or hobbyist group that can scrape together the printing time to have one of these on demand. (HT to Gaël Duval.)

hypnosec writes "Amazon's latest Kindle Paperwhite is now officially jailbroken, giving users the ability to do things like turn their eReaders into weather station displays, or connect serially to a Raspberry Pi. To jailbreak the Paperwhite, the user needs to copy a file over to the root directory of the e-Reader and restart the device. The Kindle Paperwhite jailbreak is based on a previously known hack used on the Kindle Touch."

New submitter SirTicksAlot writes "I attended World Makerfaire 2012 NYC this past weekend and wanted to share some of the highlights of the faire. Makerfaire is a gathering of smart and talented groups and individuals who share their love for making things. And there is nearly no limit as to what kind of ideas or projects on display. There is no age limit or restriction and kids of all ages are encouraged to interact with everything they can. If you ever go to shows and see 'DO NOT TOUCH,' you did not see that here. Touching, inspecting and learning is very much warranted. There were many stations where kids could learn to use tools, assemble things, and even learn to solder."

For the homebrew hardware nerds out there who also homebrew beer: "BrewPi is an open source fermentation controller that runs on an Arduino (for now) and a Raspberry Pi. It can control your beer temperature with 0.1 degree precision, log temperature data in nice graphs and is fully configurable from a web interface." Source code. The article has lots of photos and screenshots. The project involves rewiring the compressor's electrical connection through a PID controller, and includes both a fancy OLED display on the fridge and support for logging statistics and control over the web. If you've ever had the joy of gradually crash-cooling a lager (not too fast, not too slow), the software includes settings to effect gradual temperatures changes in the fermenting wort. Certainly fancier than a Johnson controller and a probe attached to a fermenter with a strip of insulating tape.

An anonymous reader writes "Looking for an inexpensive means to capture audio from a dynamically moving crowd, I sampled many MP3 players' recording capabilities. Ultimately the best bang-for-the-buck was refurbished SanDisk Sansa Clip+ devices ($26/ea) loaded with (open source) RockBox firmware. The most massively multi-track event was a thorium conference in Chicago where many attendees wore a Clip+. Volunteers worked the room with cameras, and audio capture was decoupled from video capture. It looked like this. Despite having (higher quality) ZOOM H1n and wireless mics, I've continued to use the RockBox-ified Clip+ devices ... even if the H1n is running, the Clip+ serves as backup. There's no worry about interference or staying within wireless mic range. The devices have 4GB capacity, and RockBox allows WAV capture. They'll run at least 5 hours before the battery is depleted (with lots of storage left over). I would suggest sticking with 44kHz (mono) capture, as 48kHz is unreliable. To get an idea of their sound quality, here is a 10-person dinner conversation (about thorium molten salt nuclear reactors) in a very busy restaurant. I don't know how else I could have isolated everyone's dialog for so little money. (And I would NOT recommend Clip+ with factory firmware... they only support 22kHz and levels are too high for clipping on people's collars.)" This video incorporating much of that captured audio is worth watching for its content as well as the interesting repurposing.