Press2ToContinue writes: A German carpenter has invented a valve which he claims will revolutionize contraception, by allowing a man to turn the flow of sperm from his testicles on and off at the flick of a switch. It (the switch, of course) is nearly an inch long and weighs less than a tenth of an ounce. It is surgically implanted on the vas deferens, the tube that carries sperm from the testicles, in a half-hour operation, and controlled by a switch beneath the skin of the scrotum.

So far Bimek is the only man who has the switches implanted, one for each testicle. I wonder what other switches we will see implanted into humans in the future? I think I'd like a valve for adrenaline control.

szczys writes: It's that time of year again, the Consumer Electronics Show leaks out of every media crevice. Although we've passed peak 3D Printing hype for the general public, the 3D Printer offerings being shown are notable in one way or another. Makerbot continues to flounder with questionable extruders, Lulzbot continues to excel with dual extrusion and by supporting a wide range of print materials, 3D Systems has an uber-expensive direct metal printer, but the entry level printer price floor keeps falling.

szczys writes: You take tape for granted, but it's truly an engineering wonder. For instance, Scotch Magic tape exhibits triboluminescence; it will generate a bit of bluish light when coming off the roll in a darkened room. It emits X-Rays if unrolled in a vacuum. But this common tape is just the tip of the iceberg. Nava Whiteford looks at lab uses of many different types of tape. Kapton tape is thermally stable and non-conductive. Carbon tape is conductive but resistive. That moves into the non-resistive and more niche tape types. There's a tape for every function. This instant and non-messy way to connect two things together has a lot of science behind it, as well as ahead of it in experimentation, manufacturing, and of course household use.

szczys writes: Arduino has driven a tidal wave of embedded development over the last decade. But last year a rift formed in the shape of two companies — Arduino LLC and Arduino SRL — who are suing each other over trademark. While that is ongoing, each company is trying to outdo the other in terms of new hardware. Arduino SRL is now focusing on producing connected boards and will soon have several new offerings available. The Uno WiFi is a traditional Arduino with an ESP8266 WiFi chip on board. The Tian has a MIPS processor with 2.4 & 5 GHz WiFi making it a Linux single board computer with support for low level pin driving. And the Lei is somewhere in between the other two and only for the Chinese market (it would need FCC certification to be sold in the US). From the user side the trademark dispute looks like a waste of energy, but if it drives the companies to produce more boards and fight for followers on price and quality that may be the silver lining.

An anonymous reader writes: Researchers have used a 3-D printer to make specialized ceramic parts that have overcome one of the biggest problems with ceramic objects: their tendency to crack. This new method is 100 to 1,000 times faster than previous 3D-ceramic-printing techniques, the researchers said. Furthermore, electron microscopy of the end products detected none of the porosity or surface cracks that normally weaken ceramics; indeed, these silicon carbide materials were 10 times stronger than commercially available ceramic foams of similar density, the scientists noted. "If you go very fast, about 10 times speed of sound within the atmosphere, then any vehicle will heat up tremendously because of air friction," said Tobias Schaedler, senior scientist at HRL Laboratories in Malibu, Calif. "People want to build hypersonic vehicles and you need ceramics for the whole shell of the vehicle."

An anonymous reader writes: This year, we've seen some incredible price/performance breakthroughs in low-cost single board computers. LinuxGizmos has put together a compilation of 64 low-cost, hacker friendly SBCs that are all available in models that cost less than $200, with many well below $100, including Shenzhen Xunlong's $15 quad-core Orange Pi PC, Next Thing's $9 to $24 Chip, and the $5-and-up Raspberry Pi Zero. Processors range from low-end 32-bit single core ARM chips, to 64-bit ARM, x86, and MIPS parts, and with clock rates from 300MHz to 2GHz. This year even saw the arrival of low-cost SBCs based on octa-core processors, such as the $88 Banana Pi M3.

szczys writes: We have reached a turning point in personal CNC Tools like mills and laser cutters. Up until now, your options were to drop some serious cash (businesses) or spend time to build them yourself (individuals) at moderate expense. But over the last year the number of companies making CNC tools and the software available for them has matured. Anyone looking for an entry level machine in the coming year will find that purchasing equipment has a better time/price value than building yourself. The best part is, these entry level tools have the precision you need if you still want to build your own high-end or extreme-spec machines.

An anonymous reader writes with this update about Derby who was born with a congenital deformity that deprived him of front paws and was outfitted with a pair of 3-D-printed prosthetics. According to Gizmag: "You might remember Derby, a dog who was born with a congenital deformity but last year received a 3D-printed prostheses that enabled him to run for the first time. Well, it's onward and upward for Derby and his carers, who have now crafted an upgraded set of custom prostheses allowing him to walk proudly with a straight back and even sit like a healthy dog."

An anonymous reader writes: I have a shelf full of books and other book-like things ranging from old to very old that I would like to turn into PDFs (or other similarly portable format), and have been on a slow-burn quest for the right hardware and method to do so on a budget. These are mostly sentimental — things handed down over generations, and they include family bibles, notebooks, and photo albums, as well as some conventional — published, bound — books from the late 19th and early 20th Century. None of them are especially valuable as antiques, as far as I know; my goals in preserving them are a) to make them available to other people in my family who are into genealogy or just nostalgia, and b) so I can read some of those old, interesting books (et cetera) without endangering them any more than it takes to scan them once. I was intrigued by the (funded, but not yet available) scanner mentioned earlier this year on Slashdot; it seems to do a lot of things right, but like any crowdfunded project, the proof is in the pudding, and the pudding hasn't yet arrived. It's also cheap, and that fits my household budget. What methods and hardware are you using to scan old documents? Any tips you have from a similar project, with regard to hardware, treatment of the materials being scanned, light sources, file formats, clean-up and editing tools, file-size-vs-resolution tradeoffs? In the end, I'm likely to err toward high-resolution scans, since they can be knocked down to size later if need be, but I'd be interested in hearing about what tradeoffs you've found to work for you.

One big question that I'd like to have answered: Is there stand-alone Free / Open Source software, or even just cheap software (I am mostly on Linux, by choice, but won't leap onto a sword to keep my Free Software purity) that makes for easy correction of the distortion introduced by camera-based imaging? If I could easily uncurl and keystone-correct pages, then a lot of input methods (even my phone) are suddenly much more attractive. My old Casio camera could do this 10 years ago, but I haven't found a free software desktop utility that lets me turn photos into nicely squared-up pages.

New submitter writes: I just replaced my dishwasher with a basic, inexpensive Sears model. It works fine, but only has 3 different wash cycles. I'm betting that the code to manage more cycles (as in more-expensive models) is already in the microcontroller and just needs inputs to select it. Is there any information available on this? Beyond dishwashers, have you done any useful hacks to household appliances more generally? I'd probably support a Kickstarter project that adds nice wireless notifications to my oven, clothes washer, and dishwasher.

theodp writes: More than 50 years ago, lucky kids found an Automatic Conveyor Erector Set under the Xmas tree. And while President Obama lamented last year that kids — including his own — were done a disservice by an educational system that failed to introduce computer science concepts 'with the ABCs and the colors', Radio Shack advised 'Parents Who Care' to put a TRS-80 under the tree for their kids to program way back in 1978. So, to bring things up-to-date, what are the hot tech/science gifts that Santa brought children today?

Evidently even Forrest Mimms isn't famous enough to fly without hassle when carrying a briefcase full of electronics; he writes at Make about his experiences, both before and after 2001. A relevant slice: After police were called when I was going through security at the San Antonio International Airport and after major problems going through security in Kona, Hawaii, I finally realized the obvious: Most people who don’t make things have no idea how to evaluate homemade equipment. Some are terrified by exposed wires and circuit boards, maybe because of bomb scenes in movies. So I gave up. Now my carryon bag is only half stuffed with electronics; the rest is shipped ahead via FedEx.

JustAnotherOldGuy writes: Peter "brokep" Sunde, co-founder of The Pirate Bay, has built a machine that makes 100 copies per second of Gnarls Barkley's "Crazy," storing them in /dev/null (which is of course, deleting them even as they're created). The machine, called a "Kopimashin," is cobbled together out of a Raspberry Pi, some hacky python that he doesn't want to show anyone, and an LCD screen that calculates a running tally of the damages he's inflicted upon the record industry through its use. The 8,000,000 copies it makes every day costs the record industry $10m/day in losses. At that rate, they'll be bankrupt in a few weeks at most.

An anonymous reader writes: For over a decade, Alek's Controllable Christmas Lights have been a festive online holiday tradition for millions of Internet users world-wide, so it was sadly the end of an era last year, when the Griswold wanna-be hung up his Santa Hat in 2014. But with the "Internet of Things" being the rage these days, it didn't take long for another Griswold to emerge from the North Pole, or at least pretty darn close to it. Ken Woods from Fairbanks, Alaska has his house online 24 hours a day with a dozen ON/OFF buttons that Internet users can use to toggle his lights with a click of a mouse. Here's a video of it in action and he uses Amazon EC2 to power it online. (While that all looks real, low-UID /.'ers will remember that Alek did a simulation from 2002-2004 using Perl code to switch between a series of images. Looks like the prankster dusted off that code for the Control Christmas Lights.com website.) I, for one, welcome our new Griswold Overlords with a big HO-HO-HO.

HughPickens.com writes: We've all said "just one more episode before bed" to ourselves only to fall asleep halfway through while Netflix kept playing. It's frustrating to try to put the pieces back together the next day as you attempt to determine what you last saw before you dozed off — and Netflix feels your pain. Now Nathan McAlone writes at Business Insider that Netflix has built socks that read your body to understand when you fall asleep, and then automatically pause your Netflix show. The sleep detection socks use an accelerometer to tell when you've stopped moving for a while (presumably when you've fallen asleep). In the socks prototype, an LED light in the cuff of the sock begins to flash red when you've been immobile, letting you know it is about to pause your show. If you move at all, it cancels the countdown. Netflix released a detailed parts list (PDF), including where you can purchase each item needed, as well as schematics you can follow as you build out the electronics. The company even put together the basic code you'll need to use to program the electronics, though you'll need to find your TV's IR signals to make it work. The knitting process for the socks doesn't seem too difficult (if you already know how to knit, of course), and Netflix offers a handful of patterns based on the company's popular shows — including "BoJack Horseman," "Unbreakable Kimmy Schmidt," "Bloodline," "Master of None" and "House of Cards."

An anonymous reader writes: As more and more people live closer together in tightly packed subdivisions, the mental stress of noise becomes a serious issue. Noise nuisance complaints are on the rise, litigation increasing. We try to tune it out, yet the stress it causes is still present, and there's seemingly no way around it." Six months ago a new neighbor moved in next door who has two dogs, one of which barks incessantly with a high pitched yip that is driving my wife crazy and making it difficult for me to read or work on the computer. I've already talked to my neighbor and he will bring the dog inside but three days later it starts again. What is a cost effective technical solution to knock 10 or 20 dB off the exterior noise? soundproof windows, an interior acoustic blanket,a sound blocking fence, a sound absorbing fence, planting foliage or noise cancelling headphones, or something else. I'm sure I'm not the first slashdotter to have this problem. What has worked for you?

An anonymous reader writes: Curious about the performance of a Raspberry Pi Zero, Phoronix has published a number of Raspberry Pi 2 + Pi Zero performance benchmarks with paired power consumption data. They found the Pi Zero performed slower than even an Intel Celeron 320 from the NetBurst era, but that the Raspberry Pi 2 was performing between that Celeron and a Pentium 4 "C" 2.8GHz CPU from 2004. While the Raspberry Pis didn't win in raw performance, the performance-per-Watt of the Raspberry Pi 2 was 220x greater than the Pentium Northwood. The Pi Zero had an average power consumption of 2.7 Watts and the Raspberry Pi 2 was at 3.5 Watts; however, compared to newer Broadwell and Skylake processors, Intel's low-end parts delivered greater power efficiency while the Raspberry Pi had the best value.

schwit1 writes: In discovering a new solid state for carbon scientists have also discovered that it is a relatively inexpensive way to produce diamonds. The researchers have found that, depending on the substrates, tiny diamonds will form within the Q-carbon, suggesting that they have actually discovered how diamonds are formed deep below the Earth. The hot high pressure environment there allows Q-carbon to naturally form, and in the process of its solidification diamonds are a byproduct. According to Gizmag: "Professor Jay Narayan of North Carolina State University is the lead author of three papers describing the work that sees Q-carbon join the growing list of carbon solids, a list that includes graphite, graphene, fullerene, amorphous carbon and diamond. He has suggested that the only place Q-carbon might be found in the natural world is in the core of certain planets. The researchers created Q-carbon by starting with a thin plate of sapphire (other substrates, such as glass or a plastic polymer, will also work). Using a high-power laser beam, they coated the sapphire with amorphous carbon, a carbon form with no defined crystalline structure. They then hit the carbon with the laser again, raising its temperature to about 4,000 Kelvin, and then rapidly cooled, or quenched, the melted carbon. This stage of quenching is where 'Q' in Q-carbon comes from."

szczys writes: For hardware developers, electronic surplus stores feel like being a kid in a candy shop. It's hard to walk down an aisle packed floor to ceiling with bins of seemingly-random components without feeling giddy. The wind down of domestic manufacturing, paired with the rise of online parts retailers (think eBay) has led to the shuttering of most electronic surplus shops. But a few of the best are still around. Brandon Dunson takes us on a nostalgic trip through surplus history and a tour of his local electronic surplus store. He brings it home with the saddest part of the trend: the loss of surplus means a loss of culture. Electronic flea markets and surplus stores are a nexus point of talented and interesting people. As they go, so does the opportunity to interact in person with the gurus of electronic development.

Make Magazine weighs in on an issue that's suddenly relevant in a world where less than $10 can buy a new, (nominally) complete computer. Which one makes most sense? Both the $9 C.H.I.P and the newest, stripped-down Raspberry Pi model have pluses and minuses, but to make either one actually useful takes some additional hardware; at their low prices, it's not surprising that neither one comes with so much as a case. The two make different trade-offs, despite being just a few dollars apart in ticket price. C.H.I.P. comes with built-in storage that rPi lacks, for instance, but the newest Pi, like its forebears, has built in HDMI output. Make's upshot? The cost of owning either a C.H.I.P. or a Pi is a bit more money than the retail cost of the boards. Peripherals such as a power cable, keyboard, mouse, and monitor are necessary to accomplish any computer task on either of the devices. But it turns out the $5 Raspberry Pi Zero costs significantly more to operate than the Next Thing Co. C.H.I.P.