Curated

76 Articles

Hackaday’s finest original content articles curated by the Hackaday editors

Forget The Walkman: It’s The Headphones

July 22, 2019 by 27 Comments

Forty years ago this month, a product was launched  in Japan that would have such a huge impact on the consumer electronics market that we are still using its descendants today. The story goes that one of the Sony founders would listen to music while traveling for the business, and found the company’s existing products cumbersome and awkward so asked his engineers to design something more convenient.

The resulting prototype became the Sony MDL-3L2, a set of miniaturised hi-fi headphones with distinctive foam earpads and a sliding metal headband that in total weighed an astoundingly svelte 45 g. It was paired with a cassette player called a “Walkman” derived from the company’s existing recorder that had been intended for journalists, and went on to sell in the millions. The market for headphones would never be the same again, and if you have a set of lightweight cans in your possession then this was their revolutionary progenitor.

But Hang On, What’s So Special About Headphones?

You probably won’t have heard the Walkman’s 40th anniversary described in those terms in the various reports covering the event, because of course the social impact of the portable music player rather than its headphones is what people remember. The joy of making a mix tape, of listening to The Human League on the bus, and of the adult disapproval of anything involving Kids Having Fun. Previously, music had been a static affair involving bulky record players, but now it could be taken anywhere. The other youth audio icon of that era, the boombox, simply couldn’t match the Walkman, and everybody wanted one.
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Inside The Mysterious Global Navigation Outage You Probably Didn’t Notice

July 19, 2019 by 19 Comments

The entire world has come to depend on satellite navigation systems in the forty or so years since the first Global Positioning System satellites took to orbit. Modern economies have been built on the presumption that people and assets can be located to within a meter or better anywhere on, above, or even slightly under the surface of the planet. For years, GPS was the only way to do that, but billions have been sunk into fielding other global navigation systems, achieving a measure of independence from GPS and to putting in place some badly needed redundancy in case of outages, like that suffered by the European Union’s Galileo system recently.

The problem with Galileo, the high-accuracy public access location system that’s optimized for higher latitudes, seems to be resolved as of this writing. The EU has been tight-lipped about the outage, however, leaving investigation into its root cause to a few clever hackers armed with SDRs and comprehensive knowledge of exactly how a constellation of satellites can use the principles of both general and special relativity to point you to your nearest Starbucks.

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Hacking Shelters And Swimming Pools

July 18, 2019 by 44 Comments

How would you survive in a war-torn country, where bombs could potentially fall from the sky with only very short notice? And what if the bomb in question were The Bomb — a nuclear weapon? This concern is thankfully distant for most of us, but it wasn’t always so. Only 75 years ago, bombs were raining down on England, and until much more recently the threat of global thermonuclear war was encouraging school kids to “duck and cover”. How do you protect people in these situations?

The answers, naturally, depend on the conditions at hand. In Britain before the war, money was scarce and many houses didn’t have basements or yards that were large enough to build a family-sized bomb shelter in, and they had to improvise. In Cold War America, building bomb shelters ended up as a boon for the swimming pool construction industry. In both cases, bomb shelters proved to be a test of engineering ingenuity and DIY gumption, attempting to save lives in the face of difficult-to-quantify danger from above.

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Blacksmithing For The Uninitiated: Curves And Rings

July 18, 2019 by 9 Comments

You know the funny looking side of the anvil? That’s where the best curves come from. It’s called the anvil horn and is the blacksmith’s friend when bending steel and shaping it into curves.

The principle of bending a piece of steel stock is very easy to understand. Heat it up to temperature, and hammer it over a curved profile to the intended shape. A gentler touch is required than when you are shaping metal. That’s because the intent is to bend the metal rather than deform. Let’s take a look!

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Tuning Into Atomic Radio: Quantum Technique Unlocks Laser-Based Radio Reception

July 17, 2019 by 32 Comments

The basic technology of radio hasn’t changed much since an Italian marquis first blasted telegraph messages across the Atlantic using a souped-up spark plug and a couple of coils of wire. Then as now, receiving radio waves relies on antennas of just the right shape and size to use the energy in the radio waves to induce a current that can be amplified, filtered, and demodulated, and changed into an audio waveform.

That basic equation may be set to change soon, though, as direct receivers made from an exotic phase of matter are developed and commercialized. Atomic radio, which does not rely on the trappings of traditional radio receivers, is poised to open a new window on the RF spectrum, one that is less subject to interference, takes up less space, and has much broader bandwidth than current receiver technologies. And surprisingly, it relies on just a small cloud of gas and a couple of lasers to work.

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Counter-Strike At 20: Two Hackers Upend The Gaming Industry

July 17, 2019 by 62 Comments

Choices matter. You’ve only got one shot to fulfill the objective. A single coordinated effort is required to defuse the bomb, release the hostages, or outlast the opposition. Fail, and there’s no telling when you’ll get your next shot. This is the world that Counter-Strike presented to PC players in 1999, and the paradigm shift it presented was greater than it’s deceptively simple namesake would suggest.

The reckless push forward mantra of Unreal Tournament coupled with the unrelenting speed of Quake dominated the PC FPS mind-share back then. Deathmatch with a side of CTF (capture the flag) was all anyone really played. With blazing fast respawns and rocket launchers featured as standard kit, there was little thought put towards conservative play tactics. The same sumo clash of combatants over the ever-so inconveniently placed power weapon played out time and again; while frag counts came in mega/ultra/monster-sized stacks. It was all easy come, easy go.

Counter-Strike didn’t follow the quick frag, wipe, repeat model. Counter-Strike wasn’t concerned with creating fantastical weaponry from the future. Counter-Strike was grounded in reality. Military counter terrorist forces seek to undermine an opposing terrorist team. Each side has their own objectives and weapon sets, and the in-game economy can swing the battle wildly at the start of each new round. What began as a fun project for a couple of college kids went on to become one of the most influential multiplayer games ever, and after twenty years it’s still leaving the competition in the de_dust(2).

Even if you’ve never camped with an AWP, the story of Counter-Strike is a story of an open platform that invited creative modifications and community-driven development. Not only is Counter-Strike an amazing game, it’s an amazing story.

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Exploring The Raspberry Pi 4 USB-C Issue In-Depth

July 16, 2019 by 117 Comments

It would be fair to say that the Raspberry Pi team hasn’t been without its share of hardware issues, with the Raspberry Pi 2 being camera shy, the Raspberry Pi PoE HAT suffering from a rather embarrassing USB power issue, and now the all-new Raspberry Pi 4 is the first to have USB-C power delivery, but it doesn’t do USB-C very well unless you go for a ‘dumb’ cable.

Join me below for a brief recap of those previous issues, and an in-depth summary of USB-C, the differences between regular and electronically marked (e-marked) cables, and why detection logic might be making your brand-new Raspberry Pi 4 look like an analogue set of headphones to the power delivery hardware.

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