Total Pageviews

A Cloud Of Lightning Detectors

strikes

Here’s an interesting project to plot every lightning strike on Earth. Blitzortung is a project that uses many extremely low-cost sensor boards packed with an amplifier, microcontroller, and an Ethernet socket to detect lightning strikes. When multiple stations send all that data up to a server, the location of lightning strikes can be calculated, even if they’re hundreds of miles away from any station.

Each station works by detecting a change in the local EM field caused by a lightning strike with either a large loop antenna or a smaller ferrite core antenna. These signals can be amplified and turned into usable data, time stamped, and sent out on the Internet. From there, it’s a simple time of flight calculation to precisely locate where lightning strikes.

The hardware is actually pretty simple, with based on an STM32F4 Discovery board. A controller includes an Ethernet port, GPS unit, LCD, and all the hardware associated with detecting lightning strikes.

If you’d like to see what’s possible with a huge network of lightning detectors connected to the Internet you can check out LightningMaps for a look at what’s possible.

Thanks [Sean] for sending this in.


Filed under: misc hacks

Tetris Duel with the Raspberry Pi

Tetris Duel

Building a multiplayer network game with multiple Raspberry Pis can be very difficult. Doing it in assembly is outright insane! This is exactly what a group of first year students at Imperial College London did; they created a network based multiplayer Tetris game for the Raspberry Pi.

[Han], [Piotr], [Michal], and [Utsav] have created this entire game from bare metal assembly, and it only consists of 4000 lines of code! The code is well documented, so be sure to look through their Github repository. This project is a great reference for those looking to learn bare metal assembly and networking. They even chose to use the old NES controllers, a very nice touch. While we have featured what seems like a million different Tetris games in the past, this is the first multiplayer version. See Tetris Duel in action in the video after the break!

This is a shout-out to all of you students out there. Take the time to create quality documentation for your class project, and upload it to the internet. Not only is it a great resume boost, but it could very well end up on Hackaday!


Filed under: Raspberry Pi

Hackaday Links: June 29, 2014

hackaday-links-chain

Ever see a really cool build on YouTube with no build details at all? Frustrating, right? That’s us with the NES Keytar covering the Game of Thrones theme. He’s using a Raspi with the sound chip in the NES to do live chiptunes. Freakin’ awesome. There’s also the ST:TNG theme as well.

A few years ago the folks at Oculus had an idea – because of cellphones, small, high resolution displays are really cheap, so why not make VR goggles? At Google IO this week someone figured out everyone already has a cellphone, so just wrap it in some cardboard and call it a set of VR goggles. You can get a kit here, but the only difficult to source components are the lenses.

What happens when you put liquid nitrogen under a vacuum? Well, it should evaporate more, get colder, and freeze. Then it breaks up into solid nitrogen snow. No idea what you would do with this, but there ‘ya go. Oh, [NC], we’re going to need a writeup of that LN2 generator.

About a month ago, the House4Hack hackerspace in South Africa told us of their plans to bring a glider down from 20km above the Earth. They finally launched it, The CAA only allowed them to glide back from 6km (20,000 feet), but even from there the foam glider hit 230kph (124 knots). That’s a little impressive for a foam FPV platform, and we’re betting something with a larger wingspan would probably break a spar or something. Shout out to HABEX.

All the electronic dice projects we’ve seen have one thing in common: they’re not cubes. Thus uberdice. It’s six nine-pixel displays on the faces of a cube, powered by a battery, and controlled by an accelerometer. Yes, it is by far the most complicated die ever made, but it does look cool.


Filed under: Featured, Hackaday links

Real-life FPS: This ‘smart rifle’ uses Android-enabled goggles to fire crazy accurate shots without looking (video)

Real-life FPS: This 'smart rifle' uses Android-enabled goggles to fire crazy accurate shots without looking (video)
Image Credit: TrackingPoint

How can you leverage mobile to increase profitability for your company? Find out at MobileBeat, VentureBeat's 7th annual event on the future of mobile, on July 8-9 in San Francisco. Register now and save $200!

What’s more accurate than a ‘smart rifle’ that only fires a bullet when you line the scope up with the intended target? Well, a smart rifle with a pair of Android-powered Ski goggles, of course.

The smart rifle was produced by Austin, Texas-based startup TrackingPoint, which specializes in what it refers to as “precision guided firearms” that will only set you back about $10,000.

And as you can see in the video, TrackingPoint decided to improve upon the firing experience by incorporating a wearable gadget (the Ski goggles) that runs the startup’s Shotview app. Basically, the team decided to stream a live video feed from the scope into the goggles to make a “no look” shot at 500 yards. Yes, that means you don’t even need to look into the scope to get an accurate shot.

It honestly looks like a first person shooter video game, except real, which is frightening to say the least. Check out the video embedded below for a closer look.



TrackingPoint is the Austin-based applied technology company that created the first Precision Guided Firearm (PGF). The PGF is a revolutionary new long-range shooting system that puts fighter jet lock-and-launch technology in a firearm... read more »








Lead Facebook researcher expresses regret over secret 2012 ‘mood’ study


How can you leverage mobile to increase profitability for your company? Find out at MobileBeat, VentureBeat's 7th annual event on the future of mobile, on July 8-9 in San Francisco. Register now and save $200!

After the story broke Saturday that Facebook had experimented with the moods of 700,000 of its users, the lead researcher on the project, Facebook data scientist Adam Kramer, sent VentureBeat an email Sunday pointing to his statement on the affair.

The research, which Kramer says was completed in 2012, manipulated the news feeds of only a small percentage of Facebook users, and then only for a small number of posts.

Kramer says the reason for the research was to “investigate the common worry that seeing friends post positive content leads to people feeling negative or left out.”

That’s the envy issue — the idea that seeing posts from people who are more affluent or more attractive us can make us feel bummed out. The “left out” response comes from seeing photos of fun events that the Facebooker was not invited to.

The two best known studies on Facebook angst were performed at the University of Michigan and at Berlin's Humboldt University in Germany in 2013.

Kramer says Facebook also wanted to know about user’s reactions to negative content.

“We were concerned that exposure to friends’ negativity might lead people to avoid visiting Facebook,” Kramer says.

Kramer denies that Facebook’s goal in the research “was never to upset anyone,” as Kramer puts it.

“I can understand why some people have concerns about it, and my coauthors and I are very sorry for the way the paper described the research and any anxiety it caused.”

“In hindsight, the research benefits of the paper may not have justified all of this anxiety,” he says.

Read Kramer’s full statement here.


Use a free or cheap marketing automation system? Tell us what's great about it (and not so great), and we'll share survey data from everyone else with you.


Facebook is the world's largest social network, with over 1.15 billion monthly active users. Facebook was founded by Mark Zuckerberg in February 2004, initially as an exclusive network for Harvard students. It was a huge hit: in 2 w... read more »








Yo, Facebook: What Yo and Slingshot can teach us about why people share

Yo, Facebook: What Yo and Slingshot can teach us about why people share

How can you leverage mobile to increase profitability for your company? Find out at MobileBeat, VentureBeat's 7th annual event on the future of mobile, on July 8-9 in San Francisco. Register now and save $200!

We just saw the tale of two social app releases play out in Yo and Slingshot. And while there were fair measures of wisdom and foolishness in the creation of each, it feels as if there's an unfair distribution in how much belief and incredulity the market has received each with.

Let's take a look at how these two apps differ from Snapchat, and what we can learn from all three.

Slingshot: Facebook's answer to Snapchat

Facebook recently released Slingshot, a standalone app intended to compete directly with the ephemeral Snapchat by letting you annotate and send photos to friends that auto-delete within seconds of being viewed. For younger users between the ages of 16-24, Facebook has become too big and unwieldy –- they want tighter connections with a smaller group of people who they see every day.

Additionally, Facebook's archive and index everything mentality feels like a vice principal's threat to make sure every youthful indiscretion goes on one's permanent record.

These areas of friction for Facebook are exactly where Snapchat excels, and also where it appears Slingshot is most aggressively targeting. In fact, Slingshot is shockingly absent any trace of Facebook, but despite all that Slingshot does right, they missed two key understandings that make Snapchat so successful.

Forced reciprocity: The Slingshot miss

Slingshot's one core gimmick – and ultimately its Achilles heel – is 'forced reciprocity.' This means that when I receive a photo from a friend, I am unable to view it until I send an image back to them which they in turn are unable to view until they send something back, and so on, ad infinitum. Whether your social platform exists to facilitate engagement between two friends, or to build social brand advocacy, it should reflect how the people who use it communicate in real life. Slingshot necessitates taking turns talking, engineering out the ability to have any type of linear, responsive conversation. If a snap-happy best friend is on her honeymoon in Greece and you're at your desk, you shouldn't feel compelled to create crappy pictures of your desk lamp to unlock her yacht trip around the Caldera.

Beyond mandating a 1:1 response rate, Slingshot's forced reciprocity misses another universal truth: even the greatest conversations eventually end. It's the digital equivalent of the “no you hang up first” game of puppy love, but warped into a terrible perpetuity. Every Slingshot conversation will end with someone so fatigued that they leave a message locked and a friend unvalidated.

Lessons from Yo: Dumb products built by smart people

Yo allows people to send their friends a single, un-editable message that says 'Yo'. It does absolutely nothing else. It was launched ten weeks ago, and has since netted a $1.2 million investment as a one person company. As of Friday June 20th, app ranking solution App Annie determined that Slingshot was ranked No. 79 most downloaded free app, while Yo was  No. 5. In my unvarnished opinion, Yo is a dumb product. It is, however, a dumb product built by smart people, which is where I often find the best lessons.

Yo teaches the art of simple

Yo is perhaps the archetypal example of how simple you can build something. Users know exactly what they'd want it to do, know exactly how to do it, and it mirrors an incredibly basic and frequent component of human interaction. Yo is basically just Facebook Poke in wolf's clothing, but with all the billions of dollars of connected Facebook experience stripped out. Despite the lack of functionality, this simplicity is why Yo is succeeding, if only for a short time.

Simplicity vs. usefulness: Snapchat, Yo, and Slingshot

Snapchat is another app that has embraced the art of simple, and its combination of simplicity with just enough functionality to make it useful is what has led to Snapchat's impressive success. While Yo is a brilliantly simple product, I predict the app will experience a very quick rise and fall since it just doesn't offer enough to keep bringing users back. On the opposite end of the spectrum is Slingshot, which gets a lot right, but over-complicates the overall experience with forced reciprocity. Until Slingshot removes that feature, Snapchat will remain the clear leader, with the Yo's of the world coming and going.

Slingshot is still in its early stages and Facebook has plenty of smart people to work on getting it right.

What we've seen play out this week through Yo and Slingshot starkly highlights three important lessons for those of us who spend our time building social experiences: build for the people who will love you first, don't backwards engineer for the campaign metrics or market niche you want to achieve, and know that almost no one screws up by erring on the side of simplicity.

Dan Sullivan HeadshotDan Sullivan is the founder and CEO of Crowdly, a unique advocate marketing platform that seamlessly integrates with brand Facebook communities. Dan has dedicated his entrepreneurial career to understanding and enhancing brand/consumer relationships, both on and offline. Before Crowdly, Dan was the founder of a TechStars alumni company and leading mobile crowdsourcing platform.


Use a free or cheap marketing automation system? Tell us what's great about it (and not so great), and we'll share survey data from everyone else with you.


Facebook is the world's largest social network, with over 1.15 billion monthly active users. Facebook was founded by Mark Zuckerberg in February 2004, initially as an exclusive network for Harvard students. It was a huge hit: in 2 w... read more »

Snapchat is a photo messaging application developed by four Stanford students. Using the app, users can take photos, record videos, add text and drawings, and send them to a controlled list of recipients. Users set a time limit for how... read more »

Yo is a single tap, 0 character communication tool. Yo is everything and anything, it depends on you, the recipient and time of the Yo. Wanna say 'good morning'? Yo. Wanna say 'Baby I'm thinking about you'? Yo. 'Are you up'? Yo. The po... read more »








Newly discovered planet is the most Earth-like yet, scientists say

Newly discovered planet is the most Earth-like yet, scientists say
Image Credit: PHL / UPR Arecibo

Astronomers from the University of New South Wales in Australia have discovered a new planet that could be the most similar to the Earth ever observed.

The planet, dubbed Gliese 832c, is about 16 lightyears away and about five times the size of Earth. Astronomers said the planet orbits a red giant star that’s just far enough away to reasonably support life (aka the habitable zone). Scientists previously discovered a Jupiter-like cold planet Gilese 832b orbiting the same star back in 2009.

But what makes this discovery significant is that Gliese 832c receive the same average level of stellar energy as our sun gives the Earth, according to a Sci-News report.

"With an outer giant planet and an interior potentially rocky planet, this planetary system can be thought of as a miniature version of our Solar System," professor and University of New South Wales astronomer Chris Tinney told Sci-News.

Now all we need is to get NASA’s warp drive-enabled spaceship, the Enterprise IXS, up and running so we can check it out with our own eyes.

via Gizmodo








Final Cut Pro X 10.1.2, Compressor 4.1.2, Motion 5.1.1

Adds support for Apple ProRes 4444 XQ codec to all three professional video editing apps, plus improves media storage capabilities for Final Cut Pro X. ($299.99/$49.99/$49.99 new, free updates)

 

Read the full article at TidBITS, the oldest continuously published technology publication on the Internet. To get a full-text RSS feed, help support our work and become a TidBITS member! Members also enjoy an ad-free version of our Web site, email delivery of individual articles, the ability to make long comments with live links, and discounts on Take Control orders and other Apple-related products.

Default Folder X 4.6.6

Returns the Command-D shortcut to taking you to the Desktop, plus fixes several other issues. ($34.95 new, free update, 10.7 MB)

 

Read the full article at TidBITS, the oldest continuously published technology publication on the Internet. To get a full-text RSS feed, help support our work and become a TidBITS member! Members also enjoy an ad-free version of our Web site, email delivery of individual articles, the ability to make long comments with live links, and discounts on Take Control orders and other Apple-related products.

Pebble Smartwatch Puts Notifications on Your Wrist

The leading smartwatch isn't perfect, but it has one major selling point — it actually exists, which is far more than can be said for the much-rumoured iWatch.

 

Read the full article at TidBITS, the oldest continuously published technology publication on the Internet. To get a full-text RSS feed, help support our work and become a TidBITS member! Members also enjoy an ad-free version of our Web site, email delivery of individual articles, the ability to make long comments with live links, and discounts on Take Control orders and other Apple-related products.

Simple Touch Controller Frees Up USB Port

touch screen demonstration using text

[typ.o] was working on a Raspberry Pi project and found himself running short on USB ports. The project required a touch screen interface, which takes up one of the ports. Since he was only using the screen in text mode, he decided to ditch the original USB controller and make his own.

The ever popular Attiny85 is deployed to handle the task, and is interfaced between the resistive touch panel and the Raspberry pi, using only three pins from the GPIO port. The Attiny85 runs off the 3 volt supply from the raspi, so no level shifter is needed, helping to keep his board super simple.

The calibration and calculation of the touched character location is done by a Python script running on the raspi. [typ.o] is a fan of the KISS principle, and it shows. Be sure to check out his site for all source code, schematics and a video demonstrating this simple but effective solution.


Filed under: ATtiny Hacks, Raspberry Pi

Counting Really, Really Fast With An FPGA

fast

During one of [Michael]‘s many forum lurking sessions, he came across a discussion about frequency counting on a CPLD. He wondered if he could do the same on an FPGA, and how hard it would be to count high clock rates. As it turns out, it’s pretty hard with a naive solution. Being a bit more clever turns the task into a cakewalk, with a low-end FPGA being able to count clocks over 500 MHz.

The simplest solution for counting a clock would be to count a clock for a second with a huge, 30-bit counter. This is a terrible idea: long counters have a lot of propagation delays. Also, any sampling would have to run at least twice as fast as the input signal – not a great idea if you’re counting really fast clocks.

The solution is to have the input signal drive a very small counter – only five bits – and sample the counter using a slower clock on board the FPGA. [Michael] used a 5-bit Gray code, getting rid of the problem of the ’11111′ to ’00000′ rollover of a normal binary counter.

Because [Michael] is using a 5 bit clock with 31 edges sampled at 32 MHz, he can theoretically sample a 992 MHz clock. There isn’t a chance in hell of the Spartan 6 on his Papilio Pro board ever being able to measure that, but he is able to measure a 500 MHz clock, something that would be impossible without his clever bit of code.


Filed under: FPGA