Category Archives: history

Maria Mitchell: The First Woman Astronomy Professor

On an October night in 1847, a telescope on the roof of the Pacific National Bank building on Nantucket Island was trained onto the deep black sky. At the eyepiece was an accomplished amateur astronomer on the verge of a major discovery — a new comet, one not recorded in any almanac. The comet, which we today know by the dry designator C/1847 T1, is more popularly known as “Miss Mitchell’s Comet,” named after its discoverer, a 29-year old woman named Maria Mitchell. The discovery of the comet would, after a fashion, secure her reputation as a scholar and a …read more

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Posted in astronomy, comet, Featured, history, Maria Mitchell, Miss Mitchell's comet, women in technology | Leave a comment

The Last Interesting Rover Had A Gas Turbine Engine

If you have a car parked outside as you are reading this, the overwhelming probability is that it has a reciprocating piston engine powered by either petrol(gasoline), or diesel fuel. A few of the more forward-looking among you may own a hybrid or even an electric car, and fewer still may have a piston engine car powered by LPG or methane, but that is likely to be the sum of the Hackaday reader motoring experience.

We have become used to understanding that perhaps the era of the petroleum-fueled piston engine will draw to a close and that in future decades …read more

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Posted in British Leyland, car, car hacks, engine, Engine Hacks, history, rover, turbine, turboshaft | Leave a comment

The German Space Program That Never Was

A previous post discussed the creation of the V-2 rocket, the first man-made object to reach space. Designed and built at the Peenemünde Army Research Center during World War II, the V-2 was intended to be a weapon of mass destruction, but ended up being far more effective as a tool of discovery than it ever did on the battlefield. In fact, historians now estimate that more people died during the development and construction of the V-2 than did in the actual attacks carried out with it. But even though it failed to win the war for Germany, it still …read more

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Posted in Eugen Sanger, Featured, germany, history, Original Art, space, V-2, Walter Dornberger, Wernher von Braun, world war II | Leave a comment

Calculating Like It’s 1962

We sometimes forget that the things we think of as trivial today were yesterday’s feats of extreme engineering. Consider the humble pocket calculator, these days so cheap and easy to construct that they’re essentially disposable. But building a simple “four-banger” calculator in 1962 was anything but a simple task, and it’s worth looking at what one of the giants upon whose shoulders we stand today accomplished with practically nothing.

If there’s anything that [Cliff Stoll]’s enthusiasm can’t make interesting, we don’t know what it would be, and he certainly does the job with this teardown and analysis of a vintage …read more

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Posted in acoustic, acoustic-delay memory, calculator, classic hacks, Cliff Stoll, Friden, germanium, history, piano wire | Leave a comment

The Flight That Made The Calculator And Changed The World

It was the fall of 1965 and Jack Kilby and Patrick Haggerty of Texas Instruments sat on a flight as Haggerty explained his idea for a calculator that could fit in the palm of a hand. This was a huge challenge since at that time calculators were the size of typewriters and plugged into wall sockets for their power. Kilby, who’d co-invented the integrated circuit just seven years earlier while at TI, lived to solve problems.

By the time they landed, Kilby had decided they should come up with a calculator that could fit in your pocket, cost less than …read more

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Posted in calculators, first calculator, Hackaday Columns, history, Interest, Pocketronic, solid state, ti | Leave a comment

Radio Apocalypse: The GWEN System

Recent developments on the world political stage have brought the destructive potential of electromagnetic pulses (EMP) to the fore, and people seem to have internalized the threat posed by a single thermonuclear weapon. It’s common knowledge that one bomb deployed at a high enough altitude can cause a rapid and powerful pulse of electrical and magnetic fields capable of destroying everything electrical on the ground below, sending civilization back to the 1800s in the blink of an eye.

Things are rarely as simple as the media portray, of course, and this is especially true when a phenomenon with complex physics …read more

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Posted in emp, Featured, ground wave, history, ionosphere, LF, low frequency, network, Original Art, propagation, wireless hacks | Leave a comment

The Database of the Time Lords

Time zones have been a necessity since humans could travel faster than a horse, but with computers, interconnected over a vast hive of information, a larger problem has emerged. How do you keep track of time zones? Moreover, how do you keep track of time zones throughout history?

Quick question. If it’s noon in Boston, what time is it in Phoenix? Well, Boston is in the Eastern time zone, there’s the Central time zone, and Phoenix is in the Mountain time zone; noon, eleven, ten. If it’s noon in Boston, it’s ten o’clock AM in Phoenix. Here’s a slightly harder …read more

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Posted in Featured, history, how computers track timezones, Interest, linux hacks, Original Art, slider, time zones, tz, tzdata, tz_database, zoneinfo | Leave a comment

Radio Apocalypse: The Emergency Broadcast System

Some sounds are capable of evoking instant terror. It might be the shriek of a mountain lion, or a sudden clap of thunder. Whatever your trigger sound, it instantly stimulates something deep in the lizard brain that says: get ready, danger is at hand.

For my part, you can’t get much scarier than the instantly recognizable two-tone alert signal (audio link warning) from the Emergency Broadcast System (EBS). For anyone who grew up watching TV in the 60s and 70s in the US, it was something you heard on at least a weekly basis, with that awful tone followed by …read more

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Posted in conelrad, EAS, EBS, emergency alert system, Emergency Broadcast System, fcc, Hackaday Columns, history, Original Art, public alert system | Leave a comment

Maria Goeppert-Mayer: The Other Nobel Prize Winner

Maria Goeppert-Mayer was one of only two women to win the Nobel prize for physics thus far, the other being Marie Curie. And yet her name isn’t anywhere near as well known as Marie Curie’s. She also worked on the Manhattan Project and spent time during her long career with Enrico Fermi, Max Born, Edward Teller, and many other physics luminaries.

She was “other” in another way too. She followed her husband from university to university, and due to prevailing rules against hiring both husband and wife, often had to take a non-faculty position, sometimes even with no salary. Yet …read more

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Posted in Hackaday Columns, history, Maria Goeppert-Mayer, Nobel, nobel prize winners, Original Art, physics, quantum physics | Leave a comment

Hacking When it Counts: Prison Locksmithing

In 1978, Tim Jenkin was a man living on borrowed time, and he knew it. A white South African in his late 20s, he had been born into the apartheid system of brutally enforced racial segregation. By his own admission, he didn’t even realize in his youth that apartheid existed — it was just a part of his world. But while traveling abroad in the early 1970s he began to see the injustice of the South African political system, and spurred on by what he learned, he became an activist in the anti-apartheid underground.

Intent on righting the wrongs he …read more

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Posted in apartheid, escape, Featured, history, jailbreak, lockpicking, lockpicking hacks, locks, Original Art, Pretoria, prisoner, social engineering, south africa | Leave a comment