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Electromagnetic

The Last Ride of the Pony Express - painted by  George M. Ottinger in 1873 - showing a Pon...

After linking the world for 167 years, the commercial electric telegraph is no more. The speed with which electromagnetic telegraph systems took over both short- and long-distance communication in the mid 19th century set the pattern which telephones and the internet would follow, spawning the connected world we now live in. The closing down of India's state-run Bharat Sanchar Nigam, Ltd. (BSNL) network on Monday sparked a last-minute rush of people looking to send a souvenir telegram to mark the historic event before the electric telegraph was relegated to the history books.  Read More

A MacBook's electromagnetic field brought to life (Video still: Luke Sturgeon and Shamik R...

By rigging an Android smartphone as an electromagnetic field indicator, interaction designers Luke Sturgeon and Shamik Ray have visualized the fields around everyday electronics using long-exposure photography and stop-motion animation. The results are fascinating and beautiful.  Read More

The VEPS sensor can detect signs of traumatic brain injury (TBI) that can result from blow...

Victims of penetrating head injuries usually seek immediate attention, as the hole in their skull is difficult to miss. However, people with closed-head injuries may show few immediate signs of the trauma, and appropriate diagnostic equipment (primarily a CAT scanner) is often not immediately available. A Mexican-US team of researchers has now developed a simple, easy to operate, and inexpensive electromagnetic sensor for traumatic brain injuries, suited to on site use by field personnel and paramedics.  Read More

The handheld Electromagnetic Harvester allegedly charges a AA battery using just the elect...

We're surrounded by electromagnetic fields almost everywhere these days. Just because they're almost imperceptible doesn't mean they can't be used as a source of energy though. One student in Germany recently built the Electromagnetic Harvester, a small box that allegedly charges an AA battery using just the electromagnetic fields given off by the likes of power lines, vehicles and electronic gadgets.  Read More

Researchers from Stony Brook University have developed a device capable of harvesting ener...

Much of the abundant mechanical energy around us is irregular and oscillatory and can be somewhat difficult to efficiently tap into. Typical energy harvesting systems tend to be built for low power applications in the milliwatts range but researchers from New York's Stony Brook University have developed a new patent-pending electromagnetic energy harvester capable of harnessing the vibrations of a locomotive thundering down a stretch of track to power signal lights, structural monitoring systems or even track switches.  Read More

Artist's impression of the CHAMP missile

This week, science fiction became science fact as a Boeing CHAMP missile knocked out a building full of electronics in the Utah desert at Hill Air Force Base. There was no explosion and no flying shrapnel. There was only the sound of the missile’s engine as it flew overhead and the sputtering of sophisticated computers crashing as they were hit by a beam of high-energy microwaves.  Read More

Orbit of the RBSPs in the Van Allen Belts (Image: NASA)

NASA’s twin Radiation Belt Storm Probes (RBSP) took a musical interlude and listened to the Earth singing to itself. This “Earthsong,” as NASA calls it, was recorded by the two spacecraft as they orbited inside the highly radioactive Van Allen Belts that surround the Earth. The “song” is in the form of radio waves generated by the belts and the study of it may provide a clue toward answering the question of how to protect satellites and astronauts from deadly radiation storms.  Read More

The Gauss Rifle, a homebuilt four-stage coilgun

Well, Patrick Priebe might have outdone himself with this one. In the past, the German cyberpunk weapons-maker has brought us such creations as a wrist-mounted mini-crossbow, a laser-sighted rotary-saw-blade-shooting crossbow, and a flame-throwing glove. His latest nasty futuristic device? A video game-inspired electromagnetic weapon, called the Gauss Rifle.  Read More

Lapka is  sensor that works with an iPhone app to present data on various environmental fa...

Have you ever sat and wondered what the radiation level is in your house? Or whether that food you're about to greedily tuck into is organic or not? Then Lapka may have been conceived with you in mind. The people behind Lapka – a set of sensors and accompanying app for the Apple iPhone – claim their product can do all of the above and more besides.  Read More

18 year-old engineering student Chris Rieger has spent the last 6 months building his LevL...

The inclusion of a floating lamp, bed or just about any appropriately-sized household object in a room is almost certain to be received with open-mouthed wonder and demand closer inspection from the curious minds of young and old alike. Add the wireless transfer of power into the mix and you're guaranteed to have a winner. Such is the case with 18 year-old Chris Rieger's LevLight. It's not exactly huge, doesn't break any new ground in a technical sense and is more functional than flashy. Nevertheless, the floating LED is quite the visual feast.  Read More

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