Project Tango is part of Google's Advanced Technology and Projects group (ATAP), which Wikipedia says was "...formerly a division of Motorola." Tango's goal is "to give mobile devices a human-scale understanding of space and motion." We humans and our forebears have spent millions of years learning to sense our surroundings, not as a set of static 2D images, but in 3D with motion. This YouTube video starring Johnny Lee, the Tango project lead Tim interviewed at Google I/O 2014, gives you some decent insight into Project Tango's goals -- in addition to our video, that is. (Alternate Slashdot Video Link)

We've mentioned this interesting PAC more than once, including when Steve Wozniak endorsed it. The original Mayday PAC goal was to raise $1 million. Now Larry is working on a second -- and more ambitious -- goal: To raise $5 million by July 4. We called for your questions on June 23, and got a bunch of them. This time, instead of asking via email, we used Google Hangout to ask via video. Here's a quote from the Mayday website:'We are a crowdfunded Super PAC to end all Super PACs. Ironic? Yes. Embrace the irony. We’re kickstarting a Super PAC big enough to make it possible to win a Congress committed to fundamental reform by 2016. We set fundraising goals and then crowdfund those goals." Check the Mayday About page and you'll see that a whole bunch of Internet and coding luminaries are on board. You may also notice that they span the political spectrum; this is totally not a partisan effort. | Another quote from the website: "Wealthy funders are holding our democracy hostage. We want to pay the ransom and get it back." Is this an achievable goal? We'll never know if we don't try. | This is Part 1 of a 2-part video. (Alternate Video Link) Update: 07/02 23:42 GMT by T : Here's a link to part 2 of the video, too.

The Skysense website says, 'Save time and manage your drone operations remotely: whenever the batteries run out, land on a Skysense Charging Pad and take off as soon as the batteries are recharged. Without ever leaving the office.' That certainly sounds convenient. Since it looks like everybody and her dog is jumping on the flying drone bandwagon, the next step is obviously charging the things without human intervention. We're talking about battery-powered ones, of course, like the multicopter drones that are starting to be used for things like pipeline inspection, mapmaking, and security alarm response. Sadly, using drones for beer delivery is currently against the law in the USA, as are the Burrito Bomber and the much-ballyhooed Amazon Prime Air drone delivery system. All this may change in the next few years as the FAA figures out how to regulate the many commercial drones that will inevitably be zipping through our skies, landing on pads to recharge themselves, and continuing their missions without human intervention. The next step in drone automation will probably be using driverless ground vehicles as drone launching and control stations. Shockingly, there aren't a dozen Kickstarter projects raising money to build automated ground support systems for automated flying drones already, but surely they'll show up before long. (Alternate Video Link)

Google I/O, the company's annual developer tracking^wdevelopers conference, has opened today in San Francisco. This year the company has reduced the number of conference sessions to 80, but also promised a broader approach than in previous years -- in other words, there may be a shift in focus a bit from Google's best known platforms (Chrome/Chrome OS and Android). Given its wide-ranging acquisitions and projects (like the recent purchase of Nest, which itself promptly bought Dropcam, the ever smarter fleet of self-driving cars, the growing number of Glass devices in the wild, and the announcement of a 3D scanning high end tablet quite unlike the Nexus line of tablets and phones), there's no shortage of edges to focus on. Judging from the booths set up in advance of the opening (like one with a sign announcing "The Physical Web," expect some of the stuff that gets lumped into "the Internet of Things." Watch this space -- updates will appear below -- for notes from the opening keynote, or follow along yourself with the live stream, and add your own commentary in the comments. In the days to come, watch for some video highlights of projects on display at I/O, too. Update: 06/25 17:41 GMT by T : Updates rolling in below on Android, wearables, Android in cars, Chromecast, smart watches, etc.Keep checking back! (Every few minutes, I get another chunk in there.)

Their main claim: "Sigsense Sensors are field-switchable sensing modules which replace the current generation of single purpose instruments. All Sigsense Sensors connect to the Sigsense Wireless Dock through a common interface. This portability and convenience allows workers to always carry the right instrument for the job." In other words, a technician in a food manufacturing plant doesn't need to carry a humidity-measuring tool, a multimeter, a signal strength meter, and four or five other measuring tools, to the point where he's got a backpack full of instrumentation or a rolling a cart full of measuring devices. That technician can now (in theory) carry a single, wireless sensor body, and put the sensors he needs on it as easily as you change heads on an electric hair trimmer. Check their blurb on AngelList for more about what this company is up to, and note that they are going way beyond making one measurement at a time. They're talking about collecting instrument data, along with tracking technicians, and sending all this data to the cloud, where you can do with it as you wish. But not today. The website says they will have products available "soon." (Alternate Video Link)

"Otherlab," says their projects page, "is a private Research and Development company with a number of core competencies. We welcome industrial partnerships and commercialization partners. We have worked with dozens of companies globally from small start-ups to multi-nationals and Fortune 500 businesses. We develop enabling new technologies through an emphasis on prototyping coupled to rigorous physics simulation and mathematical models. We develop our own design tools because it's lonely at the frontier and to create new things and ideas, you often have to create the tools to design them." | One of their projects is building low-cost, inflatable exoskeletons that can be used as prosthetics or -- one presumes -- as strength multipliers for people who have working limbs. This is the project today's interviewee, Tim Swift, is working on. (Alternate Video Link)

samzenpus (5) writes "Lawrence Lessig's list of achievements and areas of influence is not small. He's co-founder of the Creative Commons, but it is his Mayday PAC however that has garnered the most attention recently. The crowdfunded "Super PAC to end all Super PACs" was launched in May with the goal of raising money to elect candidates who would pass campaign finance reform. It raised over $1 million in the first 13 days and has the support of some influential people. With the help of matching contributions, Mayday hopes to raise $12 million by the end of June. Lessig has agreed to answer any questions about the PAC that you might have. As usual, ask as many as you'd like, but please, one question per post."

Modular Science is something Tim Lord spotted at last month's O'Reilly Solid Conference in San Francisco. Its founder, Peter Sand, has a Ph.D. in Computer Science from MIT. He's scheduled to speak at this year's OSCON, and his speaker blurb for that conference says, "He is the founder of ManyLabs, a nonprofit focused on teaching math and science using sensors and simulations. Peter also founded Modular Science, a company working on hardware and software tools for science labs. He has given talks at Science Hack Day, Launch Edu, and multiple academic conferences, including SIGGRAPH." And now he's also been interviewed on Slashdot. Note that there are plenty of lab automation systems out there. Peter is working on one that is not only "an order of magnitude cheaper" than similar devices, but is also easy to modify and expand. It's the sort of system that would fit well not just in a college-level lab, but in a high school lab or a local makerspace. (Alternate Video Link)

Two gyros under the seat keep this vehicle standing up at a stop, which is easier on the driver's legs than putting a foot down the way you do while riding most motorcycles. And no vroom-vroom sound, either. This is an electric motorcycle. The prototype you see in the video gets up to around 20 MPH, but production models are supposed to hit 100 MPH, and go as far as a Tesla S on 1/6 the juice. So little tiny batteries are all the Lit C-1 needs to drive (up to) 200 miles with the gyros spinning merrily away -- keeping the C-1 upright even in crashes, as a simulation in this Lit Motors YouTube video shows. They claim to have more than 200 pre-orders against a projected retail price of $24,000, which is not shabby for a company that hasn't made a single production vehicle so far. (Alternate Video Link)

Steve Delaire is making a 3-D printer that uses steel instead of plastic. Specifically, he's using TIG welding to build up layers of steel, just as most 3-D printers build up layers of plastic. He says he's "still working it out," but eventually hopes to use 3-D welding to make larger than life art pieces that are strong enough to be placed safely in public areas such as parks, where children are likely to climb on them. Steve's blog is called Molten3D, and it's a diary of his work, including the problems he encounters and how he overcomes them. He's not the only one doing metal 3-D printing; a Texas company has even made a printed metal gun. So there's plenty of people working in the field of what we really should call "additive manufacturing" instead of "3-D printing." But whatever you call it, every year we see this kind of process being used to make stronger and more complicated shapes, using an ever-increased variety of materials in ways that have been developed since this seminal paper, Liquid Metal Jetting for Printing Metal Parts, was written in 1997. (Alternate Video Link)

Mike Matter was showing off his edgertronic (named after Harold Eugene "Doc" Edgerton) high speed video camera at O'Reilly's inaugural Solid conference, when Tim Lord happened by his little show booth and started interviewing Mike with his normal speed camcorder. While Tim's camcorder shoots 720p at 30 or 60 frames per second, the edgertronic video camera shoots 720P at 700 frames per second, and can shoot lesser resolutions at up to 18,000 frames per second. But the big breakthrough here isn't performance. It's price. Most high-speed video cameras cost $20,000 to $50,000 (or even more), while Mike's edgertronic starts at a mere $5,495.00. This is still a little steep for hobby photographers, but is not bad for a tool used by professionals. And Kickstarter? You bet! Last year Mike raised $170,175, which was much more than his $97,900 goal. Now he's busy making and shipping cameras, working so many hours that he doesn't have time for his own photography. But sometimes that's the way life goes, and Mike seems to be handling it well. (Alternate Video Link)

This isn't a "both peddlers are equal" bike. The person sitting in the rear seat is in the "control" position. Because of the wide handlebars, he or she can reach around the person in the front seat to steer. The person in the front seat can't really do much except enjoy the ride, or maybe lean back and whisper a sweet nothing or two if the person in the back seat is someone the front-seater loves. The bike is called the UnaTandem (turn music off in the lower left corner of the page), and Shawn Raymond tried to get Kickstarter funding for it back in 2012 but only raised $1651, which was quite a ways short of his $70,000 goal. So, with Kickstarter in the rear view mirror, Shawn is trying to do his own crowdfunding. Will this work? Can he get enough people to buy into his idea of a tandem bike that gives you the old "riding on the handlebars" feeling to get his company off the ground? Can he use his own money (assuming he has enough) to build and sell his tandem bikes without bringing in outside investors at all? And then there's the price problem. Shawn says he's looking at a retail price in the $850 range. That may not seem like a lot to some, but you can buy 10 Walmart bikes for that much. Or four or five bikes from specialty bicycle or sporting goods stores. Despite the high price, some will undoubtedly buy these short tandem bikes and like them. But will enough people buy enough of them to make this a viable business? Shawn obviously thinks so. (Alternate Video Link)

samzenpus (5) writes Billy Mitchell owns the Rickey's World Famous Restaurant chain, sells his own line of hot sauces, and was called, "probably the greatest arcade-video-game player of all time". He was the first to achieve a perfect score in Pac-Man, and held many record scores in other arcade games. He is probably most famous for the 2007 documentary,"The King of Kong: A Fistful of Quarters". The film follows a challenger on his quest to surpass Billy's high score in Donkey Kong, which Mitchell had set in 1982. Since the film was made, the Kong crown has been held by a number people including twice by Mitchell. Billy has agreed to put down the quarters and answer any questions you might have. As usual, ask as many as you'd like, but please, one question per post.

By day John Hawley is a mild-mannered open hardware evangelist for Intel. But after hours he is the master of K-9, a robot dog he works on a little at a time. Yes, this is a Whovian thing, which is why John's K-9 looks so much like the Doctor's. But K-9 is also a pretty good dog on his/her own. No vet bills, no constant hunger, no barking at feral cats in the middle of the night, obeys every command... so maybe Dr. Who and John Hawley have the right idea when it comes to canines. Except.... aww.... my dog, Terri the Terrorist Terrier, just licked my hand. What a sweetie! Terri may not take orders from a hand-held remote, but she has a lot of other fine characteristics, including affection. K-9 is very cute in a squared-off, mechanical way, though. Hard to resist, despite a lack of soft fur and no tongue for licking his/her master's hand. (Alternate Video Link)

A while ago you had the chance to ask programmer and open source advocate Bruce Perens about the future of open source, its role in government, and a number of other questions. Below you'll find his answers and an update on what he's doing now.

Not everybody at a Maker Fair (or even Faire) is there to get kickstarted or to make a billion of whatever it is they're displaying. Ned Danyliw is one of the non-kickstarter people: an electrical engineering student displaying a quadcopter development platform he hopes can bring the cost of a quadcopter prototype down to $50 or so, or about the same price as a toy quadcopter. You can follow Ned's work step by step and see all the code at his blog, Burnt Transistors. (Alternate Video Link)

samzenpus (5) writes Andrew "bunnie" Huang holds a Ph.D in electrical engineering from MIT and is one of the most famous hardware and software hackers in the world. He is a contributing writer for MAKE magazine, and has worked on a number of projects ranging from autonomous robotic submarines to peel-and-stick electronics. We recently covered one of his latest projects, an open source hardware laptop called Novena which features entirely NDA-free components. Bunnie has agreed to take a break from his work and hack away at any questions you may have. As usual, ask as many as you'd like, but please, one question per post.

25-year electronics veteran Conrad Lee noticed that commodity multi-channel security DVRs have both more channels than a typical household needs and more capabilities than their makers advertise -- at least, with some creative re-use of their video feeds. With a home-grown controller hooked up to an otherwise unused video channel, a run of the mill security DVR can be used as a command center for household items, like lights, locks, thermostats, cameras, or whatever else you think of) by means of controls both old-fashioned (the ubiquitous X10 devices, some of which you probably have stashed in a drawer) and new (Z-wave). He showed off his system at last month's Maker Faire -- take a look (video below) at what his clever hardware re-use makes possible, and at Lee's controller. It means giving up one (relatively) inexpensive channel, to gain capabilities that would cost quite a bit more in a ready-built system, like smart-phone control and pan/tilt control for cameras. (Alternate Video Link)

Last month, at Maker Faire Bay Area 2014, Timothy Lord spotted a guy wearing a very large piece of headgear that included two crossed wrenches. The guy turned out to be Mike Szczys, Managing Editor of hackaday.com, which says, "The Hackaday Prize will send one person into space for building the next evolution of hardware." That's certainly of interest to the hardware hacker/maker crowd. How they're going to arrange the space flight (probably one of those "just above the atmosphere" hops) isn't specified, but even so the contest is an interesting idea, and the Hack A Day site seems to have some interest hacks and tutorials on it. So go ahead and enter the contest -- and don't forget to take your camera with you on your flight into space, because we'll want to see pictures! (Alternate Video Link)

A while ago you had the chance to ask amateur scientist, and author of the Getting Started in Electronics and the Engineer's Mini-Notebook series, Forrest Mims, a number of questions about science, engineering, and a lifetime of educating and experimenting. Below you'll find his detailed answers to those questions.