hackaday.com Archives - 26 May 2016, Thursday

  • PhD Crystal Radio has Pizza Capacitor

    PhD Crystal Radio has Pizza Capacitor | Hackaday

    hackaday.com 26 May '16, 8pm

    Crystal radios are old news, but great fun. What would happen if a PhD designed a crystal set? By PhD we mean Pizza Hut Deliveryperson and [John Greenlee] (who may not actually be a PhD of either kind; we don’t know) gives us a good idea with his crystal radio in a pizza box . Pizza b...

  • Hamvention: The Flea Market | Hackaday

    hackaday.com 26 May '16, 6pm

    By far the largest single stall at the flea market was Mendelsons . Mendelsons is a Dayton institution and gigantic store filled to the brim with surplus and liquidation inventory. You can get everything from a traffic signal to pallets of laundry detergent, and of course Mendlesons b...

  • This is Your Epic Weekend to Hack Together Anything

    This is Your Epic Weekend to Hack Together Anything | Hackaday

    hackaday.com 26 May '16, 3pm

    Wow how the time flies. It seems like only couple of weeks ago we were unveiling the film we shot at Salton Sea to launch this, our third global hacking initiative called The Hackaday Prize . What we want is to see you use those skills of yours to Build Something that Matters. Come up...

  • A Cornucopia of High Voltage Sources

    A Cornucopia of High Voltage Sources | Hackaday

    hackaday.com 26 May '16, 2pm

    Moving on to the higher current power sources, an often used type is a circuit using a flyback transformer and one or more transistors. As expected, the flyback transformer has a primary winding which induces a current in the secondary winding. However, there’s also a feedback winding...

  • Raspberry Pi Cluster Build Shows How and What

    Raspberry Pi Cluster Build Shows How and What | Hackaday

    hackaday.com 26 May '16, 11am

    Raspberry Pi clusters are a dime a dozen these days. Well, maybe more like £250 for a five-Pi cluster. Anyway, this project is a bit different. It’s exquisitely documented. [Nick Smith] built a 5-node Pi 3 cluster from scratch, laser-cutting his own acrylic case and tearing down a sma...

  • Flame Triodes Don’t Need Any Vacuum | Hackaday

    hackaday.com 26 May '16, 8am

    There is a rich history surrounding the improvisation of electronic components. From cats-whisker foxhole radio detectors using razor blades through radio amateurs trying antique quartz lenses as crystal resonators and 1950s experimenters making their own point-contact transistors, wh...

  • Hackaday Prize Entry: Robotic Prosthetic Leg Is Open Source And 3D-Printable | Hackaday

    hackaday.com 26 May '16, 5am

    We’ve been 3D-printing parts for self-replicating machines before, but we’ve been working on the wrong machines. Software and robotics engineer [David Sanchez Falero] is about to set it right with his Hackaday Prize entry, a 3D-printable, open source, robotic prosthetic leg for humans...

  • Smart AC Monitoring: Without the $500 Price Tag | Hackaday

    hackaday.com 26 May '16, 2am

    [Tisham Dhar] has been interested in monitoring AC power and previously built a breakout board for the ADE7763. He wanted to find something cheaper and more modern. The ATM90E26 fit the bill. It can communicate via a UART or SPI, and has multiple metering modes. The problem? The evalu...

  • Building a Flamethrower Guitar to Really Rock Out With

    Building a Flamethrower Guitar to Really Rock Out With | Hackaday

    hackaday.com 25 May '16, 11pm

    Everyone’s favorite safety-tie-wearing-eccentric-inventor, [Colin Furze], is back at it again, this time making a flamethrower guitar — sponsored by Intel!? As an ex-plumber, [Furze] is a master fabricator, and he’s brought many amazing mechanical inventions to life. In this video, pe...

  • Learn Functional Reactive Programming on Your Arduino

    Learn Functional Reactive Programming on Your Arduino | Hackaday

    hackaday.com 25 May '16, 8pm

    Everyone loves learning a new programming language, right? Well, even if you don’t like it, you should do it anyway, because thinking about problems from different perspectives is great for the imagination. Juniper is a functional reactive programming language for the Arduino platform...

  • WTF is Degaussing? | Hackaday

    hackaday.com 25 May '16, 5pm

    The modern office has become a sea of LCD monitors. It’s hard to believe that only a few years ago we were sitting behind Cathode Ray Tubes (CRTs). People have already forgotten the heat, the dust, and the lovely high frequency squeal from their flyback transformers. Image by Søren Pe...

  • The Booths Of Hamvention

    The Booths Of Hamvention | Hackaday

    hackaday.com 25 May '16, 3pm

    Hamvention was last weekend in Dayton, Ohio. Last weekend was also the Bay Area Maker Faire, and if you want tens of thousands of people who actually make stuff there’s really only one place to be. Bonus: you can also check out the US Air Force Museum at Wright-Patterson AFB. The ‘Spa...

  • Meter All The Phases: Three Phase Energy Meter With OpenWrt

    Meter All The Phases: Three Phase Energy Meter With OpenWrt | Hackaday

    hackaday.com 25 May '16, 11am

    Keeping track your overall electricity usage is a good thing, and it’s even better if you know where all the kilowatt-hours are going. [Anurag Chugh’s] house has the three phases coming from the electrical distribution box tidily organized: One for the lighting and fans, one for house...

  • Black Line Follower: A Modern Bristlebot

    Black Line Follower: A Modern Bristlebot | Hackaday

    hackaday.com 25 May '16, 8am

    It’s been a while since we’ve seen much action on the bristlebot front, which is too bad. So we’re happy to see [Extreme Electronics]’s take on the classic introductory “robot”: the Black Line Follower . The beauty of these things is their simplicity, so we’ll just point you to his bu...

  • Hackaday Prize Entry: Worldwide Educational Infrastructure | Hackaday

    hackaday.com 25 May '16, 5am

    I dunno… there’s a lot of quality education available on the internet. Kahn academy and edX come to mind. Specifically, if a school could access the internet, students could view Kahn academy videos and get a lot out of them. His explanations are simple, and work from the ground up. Y...

  • Sweet 3D Printer | Hackaday

    hackaday.com 25 May '16, 2am

    Dylan’s Candy Bar is an upscale sweet shop in Manhattan. In a stunning proof that 3D printing has become buzzword-worthy, they’ve announced a deal with Katjes Magic Candy Factory to bring four 3D gummy printers to the US (specifically, to New York, Chicago, Los Angeles, and Miami). Th...

  • 3D Printing Metal in Mid Air | Hackaday

    hackaday.com 24 May '16, 11pm

    Published only 3 days before our article on how it is high time for direct metal 3D printers , the folks at Harvard have mastered 3D metal printing in midair with no support (as well as time travel apparently). Because it hardens so quickly, support isn’t necessary, and curves, sharp ...

  • Compact Controllers Automate Window Blinds

    Compact Controllers Automate Window Blinds | Hackaday

    hackaday.com 24 May '16, 8pm

    Commercially available motorized window blinds are a nice high-end touch for today’s automated home, but they tend to command a premium price. Seems silly to charge so much for what amounts to a gear motor and controller, which is why [James Wilcox] took matters into his own hands and...

  • How The Dis-integrated 6502 Came To Be

    How The Dis-integrated 6502 Came To Be | Hackaday

    hackaday.com 24 May '16, 6pm

    What I’m most impressed about (besides just pulling it off in the first place) is the level of perfection [Eric] achieved in his design. He has virtually no errors whatsoever. In the video you’ll hear him discuss an issue with pull-up/pull-down components which did smoke some of the t...

  • Hacking for Good: Watly | Hackaday

    hackaday.com 24 May '16, 5pm

    Here at Hackaday, we often encourage people to hack for the greater good through contests. Sure, it is fun to create a wireless barbeque thermometer or an electronic giant foam finger. At the end of the day, though, those projects didn’t really change the world, or maybe they just cha...

  • Symmetry for Beginners – The Rubik’s Cube | Hackaday

    hackaday.com 24 May '16, 2pm

    Symmetry is everywhere in our natural world. Just take a look at your hands, a butterfly, or a sunflower. It’s easy to pass off the idea of symmetry and symmetric structures as a simple quirk of existence, and to pay it little mind. If this is your view, I can assure you it will no lo...

  • A Modern But Classic Enigma Machine

    A Modern But Classic Enigma Machine | Hackaday

    hackaday.com 24 May '16, 11am

    Hacking has always brought more good to the world than not hacking. The successful efforts of the Allies during World War II in deciphering the Enigma machine output still reminds us of that. Today, the machine is a classic example of cryptography and bare-metal computing. We have cov...

  • Secret Listening to Elevator Music | Hackaday

    hackaday.com 24 May '16, 8am

    While we don’t think this qualifies as a “fail”, it’s certainly not a triumph. But that’s what happens when you notice something funny and start to investigate: if you’re lucky, it ends with “Eureka!”, but most of the time it’s just “oh”. Still, it’s good to record the “ohs”. Gökberk ...

  • Hackaday Prize Entry: Industrial Servo Control On The Cheap

    Hackaday Prize Entry: Industrial Servo Control On The Cheap | Hackaday

    hackaday.com 24 May '16, 5am

    Stepper motors are good for what they do, open-loop positioning along a grid, but as far as industrial motors go they’re really not the best technology available. Steppers win on the cost curve for being uncomplicated to manufacture and easy to control, but when it comes to higher-end...

  • Make your Own Infrared Camera on the Cheap! | Hackaday

    hackaday.com 24 May '16, 2am

    This is a super fun hack that’s been around for ages — but now with cheap full 1080P HD camera availability, it’s probably a good time to make your own infrared camera! It’s actually a very easy modification to perform. All cameras are capable of “seeing” infrared light, but for stand...

  • Arduino Motion Detection With A Bit Of Wire | Hackaday

    hackaday.com 23 May '16, 11pm

    It is likely that many of us will at some time have experimented with motion detectors. Our Arduinos, Raspberry Pis, Beaglebones or whatever will have been hooked up to ultrasonic or PIR boards which will have been queried for their view of what is in front of them. [Connornishijima] ...

  • Computers Beating Computers At Cricket

    Computers Beating Computers At Cricket | Hackaday

    hackaday.com 23 May '16, 8pm

    Some see gaming as the way to make AI work, by teaching computers how to play, and win, at games. This is perhaps one step on the way to welcoming our new gaming overlords: a group of Cornell students used an FPGA to win a computer cricket game . Specifically, they figured out how to ...

  • Relive the Hackaday Belgrade Conference

    Relive the Hackaday Belgrade Conference | Hackaday

    hackaday.com 23 May '16, 7pm

    There are, however, two talks that have just been published this afternoon. These are the opening remarks presented by Aleksandar Bradic and the closing remarks which I presented. When we meet people we’re often asked about what is going on behind the scenes. It’s really easy to think...

  • The Man Who Didn’t Invent The Personal Computer | Hackaday

    hackaday.com 23 May '16, 5pm

    [John Blankenbaker] did not invent the personal computer. Museums, computer historians, and authors have other realities in mind when they say [John]’s invention, the KENBAK-1, was the first electronic, commercially available computer that was not a kit, and available to the general p...

  • 16 Megapixel Outdoor Security Camera on the Cheap

    16 Megapixel Outdoor Security Camera on the Cheap | Hackaday

    hackaday.com 23 May '16, 3pm

    Looking for a high quality security camera? Despite digital cameras continually getting better, and less expensive, security cameras haven’t seemed to follow the same path. So? Better make your own. [donothingloop] was looking for an outdoor, network capable camera of high resolution....