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Pocket Calculator Emulates Pocket Calculator

msp430 Calc Emu

[Chris] has built a pocket calculator that emulates… a pocket calculator. Two pocket calculators, in fact. Inspired by [Ken Shirriff's] incredible reverse engineering of the Sinclair scientific calculator, [Chris] decided to bring [Ken's] Sinclair and TI Datamath 2500II simulators to the physical world.

Both of these classic 70′s calculators are based on the TMS0805 processor. The 0805 ran with 320 11-bit words of ROM and only three storage registers. Sinclair’s [Nigel Searle] performed the real hack by implementing scientific calculator operations on a chip designed to be a four function calculator.

[Chris] decided to keep everything in the family by using a Texas Instruments msp430 microcontroller for emulation. He adapted [Ken's] simulator code to run on a MSP430G2452. 256 bytes of RAM and a whopping 8KB of flash made things almost too easy.[Chris'] includes ROMs for both the TI and the Sinclair calculators. The TI Datamath ROM is default, but by holding the 7 key down during boot, the Sinclair ROM is loaded. The silk screen includes key icons for both calculators, as well as some Doge-inspired wisdom on the back.

All joking aside, these really are amazing little calculators. Children of the 60′s and 70′s will be taken back when they see the LEDs flash as the emulated TMS0805 performs algorithmic arithmetic. [Chris'] code is up on Github. While he hasn’t released gerbers yet, he does have images of his PCB layout on the 43oh.com forums.


Filed under: classic hacks, handhelds hacks

THP Entry: A Repurposed Luminiferous Aether Detector

laserIn the late 1800s, no one knew what light was. Everyone knew it behaved like a wave some of the time, but all waves need to travel through some propagation medium. This propagation medium was called the luminiferous aether and an attempt to detect and quantify this aether led to one of the coolest experimental setups of all time: the Michelson-Morely experiment. It was a huge interferometer mounted on a gigantic slab of marble floating in a pool of mercury. By rotating the interferometer, Michelson and Morely expected to see a small phase shift in the interferometer, both confirming the existence of a luminiferous aether and giving them how fast the Earth moved through this medium.

Of course, there was no phase shift, throwing physics into chaos for a few years. When [Beaglebreath] first learned about the Michelson-Morely interferometer he was amazed by the experimental setup. He’s built a few interferometers over the years, but for The Hackaday Prize, he’s making something useful out of one of these luminiferous aether detectors: a functional laser rangefinder capable of measuring distances of up to 60 inches with an error of 0.000005 inches.

The core of the system is an HP 5528A laser interferometer system. [Beaglebreath] has been collecting the individual components of this system off of eBay for several years now, and amazingly, he has all the parts. That’s dedication, right there. This laser interferometer system will be mounted to a simple camera slider, and with the interferometer measurements, humidity and temperature measurements, and some interesting code (running on one of these for hacker cred), [Beaglebreath] stands a good shot at measuring things very, very accurately.

The devil is in the details, and when you’re measuring things this precisely there are a lot of details. The original Michelson-Morely interferometer was affected by passing horse-drawn carriages and even distant lightning storms. While [Beaglebreath] isn’t using as long of a beam path as the OG interferometer, he’ll still have a lot of bugs to squash to bring this project to its full potential.


SpaceWrencherThe project featured in this post is an entry in The Hackaday Prize. Build something awesome and win a trip to space or hundreds of other prizes.


Filed under: The Hackaday Prize

Rackspace insider: Reports we’ll go private are ‘bulls***’


Actually, Rackspace might not be going private.

Financial analysts are questioning a recent report that cloud and hosting provider Rackspace could go private with the help of a private-equity firm. Also, sources in the know scoffed at the rumor.

Rackspace itself has said that the company is open to moving away from its current status as an independent, publicly traded business. And executives at companies such as IBM and Cisco have said they aren’t too interested in buying Rackspace.

But the idea that Rackspace would walk away from negotiations and instead take money from an unnamed private-equity firm to go private — as TechCrunch reported last night — is hard to believe from a cash-flow and balance-sheet perspective. And it wouldn’t necessarily solve the long-term problems facing the company — particularly the competition it faces from fast-moving cloud providers like Amazon Web Services and growing hosting companies like DigitalOcean.

“An M&A transaction involving a financial buyer strikes us as unlikely,” Jonathan Atkin, an analyst at RBC Capital Markets, wrote in an email to VentureBeat. Atkin’s firm has previously pointed out that “a potential acquirer with existing enterprise reach could drive potential top-line synergies.”

One source at the company called the go-private report “bullshit” in a conversation with VentureBeat. (An official Rackspace spokesperson declined to comment on rumors or speculation.)

Meanwhile, the anonymous sources for the TechCrunch story might have even made the assertions in an effort to stir up more acquisition interest or motivate potential buyers to bid more money for the company.

“We think it is more likely that the company is trying to put pressure on potential buyers — particularly after an article was floated late last Friday stating that bidders for [Rackspace] was limited,” Wells Fargo senior analyst Gray Powell wrote in an analyst note today.

Making matters more complicated, the article did not cite a specific private-equity firm. Even if Rackspace was considering a private run like fellow Texas technology companies BMC and Dell, Rackspace might not have a company that would cooperate and lend it the necessary cash.

In any case, Rackspace investors seem to have enjoyed the report. The stock was up more than 9 percent this morning. It closed at $35.88, with a 6 percent gain for the day.



Rackspace Hosting is the service leader in cloud computing, and a founder of OpenStack, an open source cloud platform. The San Antonio-based company provides Fanatical Support® to its customers, across a portfolio of IT services, incl... read more »

The Rackspace Cloud is a set of cloud computing products and services billed on a utility computing basis from the US-based company Rackspace. Offerings include web application hosting or platform as a service ("Cloud Sites"), Cloud St... read more »








Yahoo cleans house, gets rid of unpopular products

Yahoo cleans house, gets rid of unpopular products
Image Credit: ExactTarget

Today, Yahoo announced it’s killing off a series of products — an extension of some cleaning it did last year.

Many of the features will be incorporated into Yahoo’s other offerings. For example, Yahoo will close smart email service Xobni today, but many of its signature smart functions like auto-suggest, which suggests the group of people you’d like to send an email to, and people-centric search (the ability to toggle between sent and received emails of the people you search) will me nestled into Yahoo Mail. Yahoo purchased Xobni a year ago and alluded to closing the service in an FAQ.

Other products getting the ax include the obscure Newlook, a virtual makeover tool; Research Reports, a function on Yahoo Finance that generates reports; Bookmarks.yahoo, a bookmarking tool that will be folded into Yahoo’s Toolbar; Yahoo People Search, a feature that will become a part of Yahoo’s regular search function; Yahoo Voices and Contributors Network, which allowed people to contribute content to Yahoo’s sites; and Yahoo Shine, which will manifest in Yahoo’s many digital magazines. Yahoo will also be discontinuing its Toolbar for Chrome and instead will offer Yahoo Extension for Chrome.

Since Marissa Mayer came to power at Yahoo, the company has been on a buying and deal-signing spree. In the last week alone the company has clinched two deals for Yahoo Screen, one with HBO and one that gave the company a sixth season of NBC’s cancelled show Community. It doesn’t appear to be slowing down anytime soon.

In that same vein, the company says it will continue to focus on developing its video, digital magazine, search, and communication functions.



Yahoo! is the premier digital media company. Founded in 1994 by Stanford PhD candidates David Filo and Jerry Yang as a way for them to keep track of their personal interests on the Internet, Yahoo! has grown into a company that hel... read more »








Cyberbullies get green light in New York to make your life hell

Cyberbullies get green light in New York to make your life hell
Image Credit: Shutterstock

Cyberbullies now have the law on their side in New York when it comes to making your kid’s life a living hell.

Incredibly, New York state’s highest court in Albany struck down an existing anti-cyberbullying law enacted in 2010. The New York Court of Appeals ruled that the law violated the First Amendment in a 5-2 ruling yesterday.

Essentially, the ruling means that virtual harassment, intimidation, and worse are now protected free speech, despite the fact that some young teens have killed themselves because of such taunts in the U.S. The anti-cyberbullying laws in 12 other states are still intact, so there’s hope.

Cyberbullying, according to New York law, means:

  • any act of communicating … by mechanical or electronic means
    • "including posting statements on the internet or through a computer or email network
    • "disseminating embarrassing or sexually explicit photographs
    • "disseminating private, personal, false or sexual information,
    • "or sending hate mail
  • with no legitimate private, personal, or public purpose
  • with the intent to harass, annoy, threaten, abuse, taunt, intimidate, torment, humiliate, or otherwise inflict significant emotional harm on another person.

The ruling was prompted by the sad case of New York teen Marquan Mockey-Meggs, who created a Facebook page where he posted photos of teens he knew with nasty and obscene messages and photos. Cyberbullies, you are now emboldened.


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Airbnb CEO spells out the end game for the sharing economy, in 7 quotes

Airbnb CEO spells out the end game for the sharing economy, in 7 quotes
Image Credit: Ricky Savi, Aspen Ideas Festival

The CEO of the sharing economy’s newest multibillion-dollar company, Airbnb, recently made some very bold predictions about how he and his industry will reshape the global economy. In essence, Brian Chesky wants a world more like the villages of old: highly trusting and filled with micro-entrepreneurs who shared their assets to make a living.

“Cities used to be generally villages, and everyone was essentially kind of like an entrepreneur,” he told a packed room at the Atlantic Aspen Ideas Festival. “You were either a farmer, or you worked in the city as a blacksmith, or you had some kind of trade. And then the Industrial Revolution happened.”

Part-time freelance work, known as contingent work, is on the rise. In some cases, the sharing economy is leading the way in destroying entire industries, such as the taxi industry, forcing more and more people into contingent work.

Contingent work is less certain: it has less legally sanction protections for both workers and consumers, though it often far (far) more flexible. Ultimately, Chesky argues, the added efficiency of flexible contingent work, especially those jobs involved with sharing assets, will save folks struggling in the worst rungs of the economy.

Given Chesky’s influence on this new economy, his new predictions (and personal influence) are of interest to many people.

Efficiency will save us from the robots & recession

Chesky argues that the ability to profit from sharing assets is a business model both resistant to recession and to the coming robot work-apocalypse. “There are some things that are irreplaceable. In the service industry, there things that are deeply human that people want to participate in. So I think this is the beginning of a golden age,” he said, predicting that the industry will be able to create upwards of 100 million micro-entrepreneurs.

Already, he says, he gets emails from hosts saying, “because of you we were able to keep our home.”

In other words, as the economy forces rents up and long-time residents out of their homes, the sharing economy could save the least advantaged from the ravages of capitalism. Chesky has a nice vision, and certainly some people are making rent because of Airbnb. What are the tradeoffs?

Barely regulated people-as-businesses

“We used to live in a world were there people, private citizens, a world where there are businesses, and now we’re living in a world where people can become businesses in 60 seconds,” he argues.

While he welcomes regulation, this third category of micro-entrepreneur shouldn’t need a fire marshal and inspections if they want to rent out their home for a weekend.

This flies in the face of cities like New York who want much more stringent regulation of Airbnb renters, even if it creates friction for would-be renters. This requires a whole lot of trust and thus information about each person.

Choose: Live off the grid or have a reputation

“The more you broadcast your reputation, the more you’ll have access too. you can decide to live off the grid, not have a reputation, and that’s fine and go through life. But, fewer people will know you and you’ll have access to fewer things. I actually think that’s a fair proposition.”

So, people will have a choice whether to participate, but its a binary one. What gives him so much confidence in reputation?

When reputation fails, firm first and then government

Some people are really racist, especially when they buy things off the Internet. Chesky is optimistic that the more people stay in each others homes, the more they’ll begin to understand those who are different.

But, when their system flags hosts that are unusually bigoted or destructive to their community, the company has an obligation to remove them from the system.

“The community is the first recourse, the platform is the second recourse, and the government is third recourse, rather than the reverse.” Bad reputation may harm a guest’s appeal to customers, but if some hosts continue to refuse to host any black customers, then Airbnb may just kick them off the system.

Chesky seems more optimistic that Airbnb is a better system for creating an open world than the government.

Fewer big chains, less ownership

“Everything will be small; so you’re not going to have big chain restaurants. We’re starting to see you have farmer’s markets, and small restaurants, and food trucks. But, soon, restaurants will be in people’s living rooms.”

Chesky, of course, is directing this trend. Airbnb are secretly piloting a program to host restaurants in people’s homes. And, it doesn’t end there.

Meet mass private transit

Chesky predicts private car sharing companies taking over much of public transit.

“As big as Uber and Lyft are, there are going to be companies I predict that will be as big or bigger that will also disintermediate the public-bus system…Ever been on Virgin America? Imagine you have a shuttle that felt like Virgin America—it had Wi-Fi and baristas, and it costs less than a city bus.”

A bold, if contentious, future

For internet optimists, Chesky and other sharing economy CEOs are building a collectivist utopia, regulated by transparency and a benevolent corporation. For pessimists, it will strip society of the love of ownership and individualism. Whatever readers want to happen, some version of Chesky’s future seems inevitable.


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Obama’s big NSA privacy report explained in one delightful, short debate

Obama's big NSA privacy report explained in one delightful, short debate

I just got a private front row seat to the best explanation of the Obama administration’s big 191-page privacy report on mass spying [PDF]. And, of course, I wanted to share it with our beloved readers.

In short, President Obama’s internal NSA review board reported that the government’s spying program is largely constitutional and appropriately restrained. While the group’s overwhelmingly positive view of the program outraged civil liberty advocates, I was lucky enough to have former NSA general counsel, Stewart Baker, and noted privacy journalist, Julia Angwin, explain why.

The basics

The Privacy and Civil Liberties Board issued a report on section 702 of the FISA Amendments Act, which grants intelligence agencies the broad authority to surveille the data communications of suspected foreign targets. Unlike the controversial phone meta-data collection program, 702 concerns itself with the collection of data (perhaps from undersea cables) that has Internet companies most spooked.

“Basic take away, the 702 program is doing pretty much what they expected it to do when there was a knock-down drag out fight about it 5 years ago and it was adopted”, explained Baker to me over lunch at the Atlantic Aspen Ideas Festival. “It’s mostly tailed and targeted towards particular people. But, says the civil liberties oversight board, there are some policy things that could be done to make it even more protective of privacy.”

Fortunately, Angwin was also at the table. “It’s true, as Stewart said, that these are cleaning around the edges of program that most people disagree with.” she said in response. “But there is a lot of incidental collection of US communications of people who are probably not suspected of any crime”.

While Angwin argued that there are very serious concerns with the 702 program, she agreed with Baker that report cleared the NSA of some of the worst freakout allegations. It was a “gold star” for the NSA, in Baker’s description.

So what’s there to worry about?

“It is not clear to me that Congress knew upstream part of it,” warns Angwin. “Upstream is where they set up a tap on a fiber or at an ISP [Internet Service Provider] and pull in communications from the backbone”.

Vacuuming up data inevitably leads to the incidental collection of (many) innocent Americans. Congress, she says, didn’t truly understand this part of the program.

Of course the NSA was going to pick up international cable lines

“It always seemed a little silly for people who are gathering intelligence that if you could find a cable that went straight from Europe to Japan you could tap it and take everything, but if it crossed the United States, you had lots of problems justifying it,” explains Baker.

International cables often pass through the US, so having the legal authority to tap them seemed logically similar to tapping them overseas; hence the reason for the 702 law.

“Actually, I agree with that,” said Angwin, “The NSA has had to have this weird stop order whenever things hit the US.”

But! we don’t know how many Americans are accidentally spied on

Angwin was careful to note, “I think they should have to quantify the incidental that they are collecting of innocent people and then what they do with the data later.”

Baker found this problematic, too “You do not want people searching for their girlfriends name to see who their girlfriend is talking to.” However, the data needs to available in ways that “makes it possible to search for on a very rapid and very flexible, fluid basis that you need to know tomorrow morning in order to act.”

The rub: quantifying the problem could be a problem

“The report didn’t answer, though, the question I’m just talking about, which is the incidental collection of US communications,” rebutted Angwin. “If its 10 people, fine; if it’s everyone in the United States, it’s not. We do kind of need to know that.”

Baker said that quantifying the number of innocent people could be problematic in itself. Much of the data has never been searched. “For the civil liberties groups to say ‘you know what we’d really like to see you do? We’d like to see you mine that database and find every single American in it and tell us how many there are.’ And, in the course, you have to find every American’s name,” he answered back.

“The privacy community with hang the National Security Agency from the nearest tree if they actually did what the privacy community actually seems to be asking for.”

Angwin remained skeptical that this technical hurdle absolves the NSA from auditing it’s own surveillance. In truth, the NSA has tried to quantify the number of people affected under 702: around 89,000 targets. But, a “target” could be a group of people, so the number of people spied on is likely many multiples of 89,000.

Either way, it seems that the worst fears have not been realized, at least for this one NSA program.








Pogoplug raises an extra $2M of debt

Pogoplug raises an extra $2M of debt
Image Credit: Pogoplug

Cloud Engines, Inc., creators of the Pogoplug device, just raised another $2 million, according to an SEC filing dated today.

Pogoplug allows users to automatically backup their most important files and data wherever they go thanks to unlimited cloud storage. As a matter of fact, Cloud Engines is all about the “unlimited” part of that sentence. Case in point, the company recently partnered with Sprint to offer unlimited cloud storage to users for $5 a month, falling right in line with the mobile service provider’s “unlimited” everything plans.

The company got its start in 2007 but didn’t introduce its “personal cloud” concept until 2009 with the Pogoplug device. This device is simply plugged into your ethernet router and then synced with all of your devices, including your computers, tablets, and smartphones, to enable automatic backups onto your personal cloud. The software/device combo gives users the flexibility and security they need.

Users who sign up for Pogoplug can receive 5GB of storage for free then an unlimited amount of storage for about $50 a month.

Previously, Cloud Engines raised $9.5 million during two rounds with The Foundry Group then later raised $15 million in December 2010 from Softbank Capital and Morgan Stanley.

Cloud Engines is currently headquartered in San Francisco with a satellite office in Tel Aviv and has about 60 employees. CEO Daniel Putterman previously founded and led Mediabolic, a software company that was later purchased by Macrovision.



Pogoplug provides secure storage of digital media from the privacy of a user's home or office, enabling users to access, share and stream their content from any connected device. The Pogoplug service lets users host their own persona... read more »

Ron is Managing Partner of SoftBank Capital, the investment arm of the SoftBank Group, a global telecommunications, Internet and media conglomerate. He is also Director and President of SoftBank Holdings, Inc. and a member of the board... read more »