h:D

Planet

  • Jeudi, Mars 20, 2014 - 22:15
    Kinematics Bodice: First Piece of Kinematics Clothing from Nervous System! #3DThursday #3DPrinting #3DScanning

    Jessica nervous system

    Kinematics Bodice: First Piece of Kinematics Clothing from Nervous System:

    The first piece of Kinematics clothing, a 3D-printed nylon bodice, will be debuted in New York City this week at the opening of the exhibition “Coding the Body” at apexart. The bodice is composed of 1,320 unique hinged pieces and was 3D-printed as a single part. In order to fit the bodice into the printer and minimize the space it took up in the machine, the design was printed in a flattened form that was designed with Nervous System’s “Kinematics” folding software. The bodice was wearable straight out of the printer; no pieces were manually assembled and no fasteners were added. The back features integrated 3D-printed snaps for fastening the garment.

    The bodice was produced from a 3D scan of Jessica Rosenkrantz, one of the designers. It serves as a proof of concept for Nervous System’s “Kinematics” design system which pairs a constructional logic of hinged panels with a simulation strategy of folding and compression to produce customized clothing designs that can be fabricated efficiently by 3D-printing. The system is an example of the developing field of 4D-printing where 3D-printing is used to create objects that transform in shape. Background information on our “Kinematics” project can be found here….

    More details of the “long road to printing a kinematics dress” here!

    Pasted Image 3 20 14 4 50 PM


    649-1
    Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

    Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

    The Adafruit Learning System has dozens of great tools to get you well on your way to creating incredible works of engineering, interactive art, and design with your 3D printer! We also offer the MakerBot Digitizer in our store. If you’ve made a cool project that combines 3D printing and electronics, be sure to let us know, and we’ll feature it here!

  • Jeudi, Mars 20, 2014 - 22:00
    Game of Thrones Kingsguard Armor

    got kings guard armor

    Being the King of Westeros comes with perks and one of them is having your own Kingsguard. The elite group of knights will keep you safe from assassins, family members, you name it. RPF user teranmx created this armor set based on the Kingsguard armor seen in Game of Thrones. It looks beautiful and fit for knights serving the throne. The maker explained the build process at the RPF:

    I carved all of the patterns with my dremel. I used pvc glue to fuse it together. I used Bondo to fill gaps. I did add a few rivets for attaching tough areas and for comparison to other rivet marks. I do know from some more recent photos there are more details on the chest that I missed. I would like to fix that on the next one I make. On the shoulder pauldrons I took a bowl and vacuum formed the pvc over it, cut it mid way and then attached the two pieces together with the other part of the bowl pointing outward. I fused it with pvc glue, extra support with rivets, to fill big gaps i used window screen as a fiber for the bondo to hold onto extra along with the pvc. It allowed me to get those corners sharp since there was like a 1 inch gap in between the top and bottom. If I could’ve afforded it I would gone the next step further and made molds of all of this and cast them in another material so they would be solid.

    got kings guard armor 2

    Read more at The RPF.

  • Jeudi, Mars 20, 2014 - 21:42
    Motion Control for the Masses: The TinyG Story

    TinyGTinyG offers industrial-grade motion control that's accessible to casual users while still powerful enough for pros.

    Read more on MAKE


  • Jeudi, Mars 20, 2014 - 21:00
    Full-sized, 3D-Printed Kayak! #3DThursday #3DPrinting #3DScanning

    If the honor of being the first 3D printed full-size boat would probably have to go to the Washington Open Object Fabricators (WOOF) team’s 3D printed milk jug race project back in Seattle in 2012, this is one of the more successful larger-than-a-human scale objects I’ve seen yet!
    Full-sized, 3D-Printed Kayak! Created by Grass Roots Engineering:

    I have completed construction of a completely 3D printed, customized Kayak. The Kayak measures 16ft 8in [5.08m] long and cost around $500 to make. It is made of ABS plastic, machine screws, brass threaded inserts and a little bit of silicone caulk. That’s it. And it floats. And I can Kayak around in it. In order to print such large, solid sections of Kayak, I had to modify my home-built, large scale 3D printer to print the parts inside a heated chamber so they would not warp or crack.

    The Kayak

    The Kayak is comprised of 28, 3D printed sections. Each section has brass threaded thermoplastic inserts so the next corresponding section can be screwed into it. Silicone caulk is only used between the sections to ensure it is watertight. This design was initially based on the Siskiwit Bay kayak by Bryan Hansel, but heavily modified for 3D printing. The shape of the kayak was tweaked to optimize performance based on my height and weight. To reduce print time and material usage, the kayak is printed at a 0.65mm layer height. It features a 6mm thick hull with a built-in, internal rib/support structure to give it strength, yet be lightweight and use less ABS plastic. On the bow and stern of the Kayak I added attach points for cameras, handles and future add-ons….

    Read more.

    Grass Roots Engineering

    Grass Roots Engineering


    649-1
    Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

    Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

    The Adafruit Learning System has dozens of great tools to get you well on your way to creating incredible works of engineering, interactive art, and design with your 3D printer! We also offer the MakerBot Digitizer in our store. If you’ve made a cool project that combines 3D printing and electronics, be sure to let us know, and we’ll feature it here!

  • Jeudi, Mars 20, 2014 - 21:00
    Fail of the Week: The Demise of Lil’ Screwy

    fotw-demise-of-lil-screwy

    The subject of this Fail of the Week installment is entertaining if nothing else. [Chris] decided to see what kind of forces his home-built 100 ton press could stand up to. Turns out the press failed at punching a 1.5″ hole through 1/2″ plate steel.

    If you didn’t see it back in February make sure you take a gander at the premier of Lil’ Screwy. The diminutive press packed quite a bit of punch, using four hand-cranked screws to knock out holes in metal. [Chris] decided to tie-one-on and take his lathe for a spin to machine the larger 1.5″ punch set.

    He probably should have known when he switched from a 4-foot ratchet to a crescent wrench with a 12-foot pipe for leverage that this was going to be more than the press could handle. The bottom plate seen in the image above is beginning to cup, which in turn jams up the screws in the off-kilter threads.

    We fell a bit guilty in admitting we love to see equipment pushed to the point of failure like this. But perhaps that’s part of what this column is all about. Our favorite is still the PCB shear failure, but this comes in at a close second. Check out the video presentation after the break; just be warned that there’s a bit of rough language as part of the narrative.


    2013-09-05-Hackaday-Fail-tips-tileFail of the Week is a Hackaday column which runs every Wednesday. Help keep the fun rolling by writing about your past failures and sending us a link to the story – or sending in links to fail write ups you find in your Internet travels.

    Filed under: Fail of the Week, Hackaday Columns

  • Jeudi, Mars 20, 2014 - 20:45
    MakerBot Academy | An Athlete’s Gift to Golden State Students

    GoldenStateWarrior_BlogPost2

    They may be closing in on No. 1 in their conference, but the Golden State Warriors are about more than just winning games. In fact, when NBA forward Harrison Barnes isn’t helping the Golden State Warriors blaze a five-game winning streak, he’s an avid MakerBot Academy supporter.

    “For young kids, it’s a great alternative as opposed to playing video games or something less productive,” says the man with a 38-inch standing vertical jump. “It’s a way you can learn and have fun at the same time.”

    GoldenStateWarrior_BlogPost2_secondimage_quote

    To get students from the San Francisco Bay Area excited about 3D printing, Barnes stopped by Oakland High School last Monday with MakerBot CEO Bre Pettis and America Makes executive director Ralph Resnick to donate a MakerBot Replicator 2 Desktop 3D Printer.  The MakerBot Replicator 2 will be part of the science and engineering classes at the school.

    We can’t wait to see what the students of Oakland High will make!

  • Jeudi, Mars 20, 2014 - 20:15
    New Project: Toothy Toothbrush Timer

    tooth-timer-use_1Using a 555 timer chip, a modified servomotor, and chattering novelty teeth, get your dentist-recommended brush time every time, with the Toothy Toothbrush Timer.

    Read more on MAKE


  • Jeudi, Mars 20, 2014 - 19:25
    Embedded Software Engineer Needed / Adafruit Jobs Board

    BioLite-CampStove-SM120311-05-V2

    Embedded Software Engineer Needed / Adafruit Jobs Board

    SUMMARY:
    BioLite is seeking a software engineer to join us in developing our next generation of cutting-edge clean energy solutions. In this role you’ll develop firmware for a range of exciting new products, and work on challenging data analysis, research and productivity questions.

    TITLE: Software Engineer
    HOURS: Full-time
    LOCATION: Brooklyn, New York
    REPORTS TO: Director of Engineering
    COMPENSATION: Salary is competitive with other early-stage companies, including benefits, bonus plan, and equity stock options.

    OVERVIEW:
    BioLite is a for-profit social enterprise that develops, manufactures and markets distributed energy solutions for off-grid communities around the world. Our business serves two distinct markets, 1) developing-world families living in energy poverty, and 2) outdoor enthusiasts seeking fuel-independent cooking and electricity.
    This is a unique opportunity to join a fast-moving startup with both a technical and creative environment in the heart of Brooklyn. If you are looking to work with a growing product development team with a passion for the outdoors and a powerful social mission, we’re your company. You’ll have the opportunity to work on a range of products and research programs funded by both our product stream and research grants.

    KEY ACTIVITIES:
    • Firmware development for new energy-related products; will include firmware architecture design, code development, documentation, rigorous testing and debugging, and manufacture support.
    • Data analysis, scripting and research support for internal technology development, funded research, and product development; will include test automation, data gathering and analysis, presentation of results, and support of other team members in this process.
    • Development of internal systems and processes for productivity, information security, etc; will include general software engineering support, management of software processes, and development of software solutions to facilitate collaboration and productivity within the company.

    KEY ATTRIBUTES:
    The ideal candidate for this position
    • has a excellent academic and technical background in software engineering or computer science,
    • has 2-5 years of development experience in a range of languages and domains, including low-level embedded systems, scripting and data analysis,
    • is comfortable in a fast-paced, agile work environment and excited to tackle new challenges,
    • can work independently and take initiative while remaining a productive part of an interdisciplinary and collaborative product-development team.

    EXPERIENCE AND SKILLS REQUIRED:
    • experience with C for embedded microcontrollers/DSPs
    • experience with general-purpose scripting, preferably Python
    • experience with data analysis in MATLAB, R, or similar
    • experience with modern web frameworks desirable
    • some hardware experience preferred, e.g. basic circuit design, control systems, etc.
    • enthusiasm for new technology, a passion for collaboration and a sense of humor!

    Learn More

  • Jeudi, Mars 20, 2014 - 19:00
    The 3D Printer Experience @ Chicago, Illinois – #3DxRetail #3DThursday #3DPrinting

    [3DxRetail: This week for #3DThursday, I'll highlight the recent explosion in desktop 3D printer brick-and-mortar retail stores -- sharing a scattering of these unusual locations from all across the world. Only time will tell which particular version of this phenomena will be sustainable and hold the interest of the public. There appears to be enough interest and pioneering spirit that solving the 3DxRetail mystery could still be anyone's game!]

    The 3D Printer Experience @ Chicago, Illinois:

    Experience 3D printing first-hand! You may have read about it in the media or heard about it in the President’s State of the Union address. Now you can see what all the buzz is about!

    With over twenty 3D printers in-house and exciting new applications for you to explore. We are here to introduce you to a very bright future of personal, desktop manufacturing. We are dedicated to helping you navigate the path to greater creativity and freedom.

    This technology will dramatically alter our lives in the coming years so come visit and take part in a more imaginative and promising world….

    Read More.

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  • Jeudi, Mars 20, 2014 - 18:00
    MRRF: Roundtable And Roundup

    Last weekend Hackaday made a trip out to the Midwest RepRap Festival in Goshen, Indiana. We met a ton of interesting people, saw a lot of cool stuff, and managed to avoid the Amish horse and buggies plying the roads around Goshen.

    We’ve already posted a few things from MRRF, including [Jordan Miller] and co.’s adventures in bioprinting, a very cool printable object repo that’s backed by a nonprofit LLC, some stuff from Lulzbot that included a new extruder, stretchy filament, and news of a 3D scanner that’s in development, ARM-based CNC controllers including the Smoothieboard and capes for the Beaglebone, 3D printed resin molds, the newest project from [Nicholas Seward], creator or the RepRap Wally, Simpson, and Lisa, and 3D printed waffles. It really was an amazing event and also the largest DIY 3D printer convention on the planet. How this happened in Goshen, Indiana is anyone’s guess, but we’d like to give a shout out to SeeMeCNC for organizing this event.

    With so many famous RepRappers in one place, it only made sense to put together a round table discussion on the state of RepRap, 3D printers, and microfabrication. We have a 40-minute long video of that, which you can check out after the break.

    The video above is a Q&A session with [Johnny Russell] of Ultimachine, developer for the RAMPS and RAMBo electronics boards, [Prusa] of Prusa Mendel and i3 fame, [Mike] a.k.a [Maxbots] of Maker’s Tool Works and developer of the MendelMax 2, and [Aeva], robot psychologist at Lulzbot (seriously, that’s what her card says). It’s not a lie to say these guys have had a hand in the stuff that has gone into 90% of all the RepRaps out there.

    We highly suggest getting a cup of coffee and opening that video up in a new tab. There are some great comments between the four of them, and some very insightful questions from the audience. Here’s a list of the questions asked:

    • What are the economics of open source and cheap clones?
    • Where is the RepRap community going this year?
    • How should companies incentivize less glamorous projects?
    • When do we get functional mechanical parts in 3D printing?
    • What are some recommendations for subtractive manufacturing toolchains?
    • Where is RepRap popular around the world?
    • What will happen with SLS patents expiring?
    • How did you get started and how can someone new contribute?
    • Can RepRap indefinitely fend off DRM?
    • What are some recommendations for open source 3D modelling programs?

    Also at the MRRF was mUVe 3D, makers of a very cool resin printer, and the only people in the RepRap community that have seen the light of coroplast for making non-structural panels on their machines. We also grabbed a video of them:


    Once again, we’d like to thank everyone who came out, SeeMeCNC for putting this event together, Makers Tool Works for 3D printed waffle irons, and everybody else who headed out to Goshen for the largest convention dedicated to RepRaps in the world.

    If you didn’t make it out, here’s some aerial footage courtesy of [Phil Briski] and his tiny quadcopter. Be sure to check out the 5 foot by 8 foot Jolly Wrencher flag, something we’re now considering putting in a Hackaday store. Hope to see you there next year!

    flag
    Simpson3
    simpson
    A vertical H-bot
    air1
    video
    This man was on the cover of Forbes magazine
    tant
    taz
    screw
    simpson2
    air2
    Custom waffles.
    mill
    scan
    Rules for the venue. No beer kegs *on the carpet*.
    Filed under: 3d Printer hacks, Hackaday Columns

  • Jeudi, Mars 20, 2014 - 18:00
    Eat Your 3D Prints

    3dp-sugar-chocolateThey're almost too pretty to put in your mouth.

    Read more on MAKE


  • Jeudi, Mars 20, 2014 - 18:00
    Another Step Closer to a Living Tissue 3D Printer #3DThursday #3DPrinting

    Bioprinter01

    Another Step Closer to a Living Tissue 3D Printer, from Txchnologist.:

    Harvard bioengineers say they have taken a big step toward using 3-D printers to make living tissue. They’ve made a machine with multiple printer heads that each extrudes a different biological building block to make complex tissue and blood vessels.

    Their work represents a significant advance toward producing living medical models upon which drugs could be tested for safety and effectiveness.

    It also advances the ball in the direction of an even bigger goal. Such a machine and the techniques being refined by researchers offer a glimpse of the early steps in a sci-fi healthcare scenario: One day surgeons might feed detailed CT scans of human body parts into a 3-D printer, manipulate them with design software, and produce healthy replacements for diseased or injured tissues or organs….

    Read More.

    Bioprinter02

    Bioprinter03


    649-1
    Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

    Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

    The Adafruit Learning System has dozens of great tools to get you well on your way to creating incredible works of engineering, interactive art, and design with your 3D printer! If you’ve made a cool project that combines 3D printing and electronics, be sure to let us know, and we’ll feature it here!

  • Jeudi, Mars 20, 2014 - 17:35
    Launching Tonight: Intel Galileo Maker Sessions

    New-slideTonight at 6pm PT we're launching the Getting Started with Intel Galileo Maker Sessions. Join our Hangout to learn more about the Intel-based Arduino-compatible board.

    Read more on MAKE


  • Jeudi, Mars 20, 2014 - 17:15
    MakerBot Retail Store @ New York City – #3DxRetail #3DThursday #3DPrinting

    [3DxRetail: This week for #3DThursday, I'll highlight the recent explosion in desktop 3D printer brick-and-mortar retail stores -- sharing a scattering of these unusual locations from all across the world. Only time will tell which particular version of this phenomena will be sustainable and hold the interest of the public. There appears to be enough interest and pioneering spirit that solving the 3DxRetail mystery could still be anyone's game!]

    One of the very first to launch a retail store and now with locations in Greenwich and Boston, the MakerBot Retail Store is one of the first that comes to mind when people are wondering what a 3D printer store looks like. Check out the video from a visit from Tested.com above for a chance to see how the store looked and functioned when it first launched — with the amazing MakerBot Marble Run that people still talk about today, created by Adam Fontenault and Chris Boynton (video below of them installing it in the space)!

    MakerBot Retail Store @ New York City:

    Come visit one of our retail locations to get the full MakerBot experience. You can watch MakerBot Replicator Desktop 3D Printers make new objects; see the MakerBot Digitizer Desktop 3D Scanner turn objects into 3D models; attend fascinating classes and workshops; buy cool 3D printed gifts; and even purchase a MakerBot Replicator 3D Printer on the spot!

    Read more.

    Pasted Image 3 20 14 12 00 PM

  • Jeudi, Mars 20, 2014 - 17:01
    SXSW Create 2014

    Two weeks ago we were just 19 people with a dream: a dream to put a sharp needle and a fistful of electronics in the hands of every man, woman and child at South By Southwest, and teach them how to sew up a circuit (also a dream to put a breakfast taco in the hands and mouths of 19 SparkFun employees). I’m here today to tell you that dreams come true, and from March 7-9, not only did we get to help around 1200 enthusiastic SXSW Create attendees make their own wearable, light-up badge, we also consumed a borderline-obscene quantity of breakfast tacos*. Videographer and newly-converted Lone Star enthusiast Gregg has assembled a great recap of our time at SXSW and some of the exciting things we saw. Check it out!

    As you can see, we were very busy and had a great time. We also have a slew of photos we took at the booth and around Austin on our Flickr page, so have a gander. This was our second year hosting a workshop at the SXSW Create tent, and it’s a great fit for SparkFun. We loved seeing what all the like-minded makers and doers are up to, and meeting all of the people who came by! Thanks to everyone who stopped in and made our weekend great - either by assembling a kit or just chatting with us about what you’re into - and we’ll see you in Austin next year!

    *footage not found

    comments | comment feed

  • Jeudi, Mars 20, 2014 - 16:24
    Hands On: Project Tango, Google’s 3D-Scanning Phone for Makers

    trimble-tx8-home-exteriorHow does the new room-mapping phone stack up against industrial scanners? We get our hands on one to find out.

    Read more on MAKE


  • Jeudi, Mars 20, 2014 - 16:07
    New Project: CNC Maker Bench

    CNC_MakerBench_PeopleIMG_0886Create custom, open-source CNC tables for your workshop using AtFab’s parametric program — or just download and fabricate MAKE’s design.

    Read more on MAKE


  • Jeudi, Mars 20, 2014 - 16:00
    3D Printed Resin Molds and Rotocaster for Fast Hollow Casting @ MRRF #3DxMoldmaking #3DThursday #3DPrinting

    Here’s a great use-case for flexible filament — rotocasting! There was a strong push for affordable DIY rotocasters in the maker scene back in 2012, particularly with projects from Matt Stutlz and others — I’m looking forward to seeing renewed interest now with flexible filament and projects like the RotoMAAK!

    3D Printed Resin Molds and Rotocaster for Fast Hollow Casting @ MRRF:

    …A slightly more interesting find at this year’s MRRF was a lot of resin cast parts from [Mark VanDiepenbos]. He’s the guy behind the RotoMAAK, a spinny, ‘this was in the movie Contact‘-like device designed for spin casting with resins. At the festival, he’s showing off his latest project, 3D printed resin molds.

    With the right mold, anyone with 2-part resins can replicate dozens of identical parts in an hour. The only problem is you need a mold to cast the parts. You could print a plastic part and make a silicone mold to cast your part. The much more clever solution would be to print the mold directly and fill it with resin.

    [Mark] printed the two-part rabbit mold seen above out of ABS, filled it with urethane resin, and chucked it into his RotoMAAK spin casting machine. Six minutes later the part popped right out, and the mold was ready to make another rabbit….

    Read More.

    RotoMAAK


    649-1
    Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

    Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

    The Adafruit Learning System has dozens of great tools to get you well on your way to creating incredible works of engineering, interactive art, and design with your 3D printer! If you’ve made a cool project that combines 3D printing and electronics, be sure to let us know, and we’ll feature it here!

  • Jeudi, Mars 20, 2014 - 15:44
    Homecaster – Using the @adafruit WiFi shield to send messages from the web to @arduino #cc3000 #IoT

    Homecaster – Using the @adafruit WiFi shield to send messages from the web to @arduino.


    Featured Adafruit Product!

    Pasted Image 3 2 14 11 42 PM

    Adafruit CC3000 WiFi Shield with Onboard Ceramic Antenna: The CC3000 hits that sweet spot of usability, price and capability. It uses SPI for communication (not UART!) so you can push data as fast as you want or as slow as you want. It has a proper interrupt system with IRQ pin so you can have asynchronous connections. It supports 802.11b/g, open/WEP/WPA/WPA2 security, TKIP & AES. A built in TCP/IP stack with a “BSD socket” interface. TCP and UDP in both client and server mode, up to 4 concurrent sockets. It does not support “AP” mode, it can connect to an access point but it cannot be an access point. We carefully wrapped this little silver module into an Arduino shield. We also added a microSD socket and a reset button. It has an onboard 3.3V regulator that can handle the 350mA peak current, and a level shifter to allow 3 or 5V logic level (read more).

  • Jeudi, Mars 20, 2014 - 15:20
    Evil Mad Scientists, now accepting Bitcoin #bitcoin @bitpay

    Bitcoin Accepted
    Evil Mad Scientists, now accepting Bitcoin.

    Just a little note to say that our Evil Mad Scientist shop is now (“finally?”) accepting payments in Bitcoin. Our Bitcoin payments are processed through BitPay, one of the largest and most trusted processors for Bitcoin-based online payments.


    2120X1192 Adafruit Bitcoin Banner-1

    Greetings programs! Adafruit is pleased to offer BitCoin as a payment method for Adafruit purchases. We’re using BitPay as our payment processor. BitPay is an electronic payment processing system for the bitcoin currency. BitPay enables online merchants to accept bitcoins, as a form of payment like payments from Visa, Mastercard, Amex, Google Wallet and Paypal.

    Here’s a video from BitPay that explains their service. And below is the Bitcoin.org overview of Bitcoin and video.

    Bitcoin uses peer-to-peer technology to operate with no central authority or banks; managing transactions and the issuing of bitcoins is carried out collectively by the network. Bitcoin is open-source; its design is public, nobody owns or controls Bitcoin and everyone can take part. Through many of its unique properties, Bitcoin allows exciting uses that could not be covered by any previous payment system.

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