Year: 2024

Battery life has long been a key limiting factor in drone use. Although there are commercial models that can stay aloft for 45 minutes or longer on a single charge, being able to keep drones in the air for longer would be helpful for many purposes. Researchers at the University of Southern Denmark have been working on that issue for several years by developing drones that can recharge directly from power lines.

This time around, the scientists attached a gripper system to a Tarot 650 Sport drone, which they customized with a electric quadcopter propulsion system, an autopilot module and other components. When the drone’s systems detect that the battery is running low, the device employs its camera and millimeter-wave radar system to pinpoint the closest power line, as New Atlas notes.

The drone then flies up to the power line from underneath, using a pair of inward-sloping arms to guide the cable into the gripper. An inductive charger pulls current from the power line. When the battery is full, the gripper opens and the drone continues on its way.

At the outset, the idea is for drones that inspect power lines to use this charging system. The researchers first showed off a self-charging drone that tops up its battery from power lines in 2022. This time around, they improved the gripper system and demonstrated a real-world use case for the tech.

In a paper they’re presenting at next month’s IEEE International Conference on Robotics and Automation, the team described the project as “to the best of our knowledge, a first-in-the-world system with the ability to sustain operation throughout many inspection/charging cycles powered by energy harvesting from power lines in a real outdoor environment.” In arguably the most successful test, the drone stayed aloft for over two hours through five cycles of power line inspection and charging.

Drones have been used for years to monitor and inspect power lines. They’re particularly useful in remote areas, such as mountain tops, where examining power lines manually is a tough ask. Still, it’s hard not to feel a little uneasy about drones clamping onto power lines. If anything goes wrong and a drone somehow ends up damaging a power line, an entire region could lose electricity. Charging pads for drone exist and may be a safer option, but they’d require extra space for infrastructure.

This article originally appeared on Engadget at https://www.engadget.com/drones-that-charge-on-power-lines-may-not-be-the-best-idea-163942109.html?src=rss

Google has finally launched its long-awaited Find My Device network after teasing it at last year’s I/O event. The technology leverages a crowdsourced network of over a billion Android devices to help people locate lost gadgets, with a basic functionality in line with similar offerings from Apple and Tile. It’s rolling out today to Android users in the US and Canada, with a global release coming soon.

Once installed, people can use the app to locate compatible Android phones and tablets. The tool will cause them to ring at your command and their location will pop up on a map. This map data works even if the items are offline. Pixel 8 and Pixel 8 Pro smartphones will appear on the map if they’re powered off or if the battery is completely dead. That sounds pretty handy.

The technology isn’t yet available for everyday items, but that’s coming soon. Bluetooth tracker tags from Chipolo and Pebblebee will get integrated into the Find My Device app in May. This will let users locate just about anything, including car keys, purses, wallets and, hopefully, wandering felines. The upcoming tags are being built specifically for the network.

Google

The Pebblebee offerings include tags, clips and slim cards for wallets. They hit store shelves in late May or early June. Chipolo is making versions of its One Point and Card Point trackers for Android devices, which will arrive in May. Google says more trackers are coming later this year, including products made by Motorola and eufy.

Google’s Find My Device service also integrates with Nest smart home gadgets. If you lose something in the home, the Find My Device app will show you the location of the item in relation to pre-existing Nest devices. This should help provide an “easy reference point” to snatch them back up.

Finally, there’s a nifty feature that lets you share the location of an item with other people, so friends and family can keep an eye on precious belongings. Google says it’ll let folks “easily divide and conquer if something goes missing.” 

The new Find My Device tracking technology works on devices running Android 9 and above. That OS came out in 2018, so it means a whole lot of people will have access to this service. As for compatible products beyond Android devices and Bluetooth tags, the company says future software updates will allow integration with a full range of headphones from JBL and Sony.

Of course, there are the usual privacy concerns with this kind of thing. Google says that users can opt out of the service via a web portal if they feel uncomfortable, according to a story by The Verge. Reports indicate that the technology has been ready for a while, but Google delayed it until Apple implemented tracking protections into iOS to address stalking concerns. To that end, both companies announced a partnership last year to develop industry standards to fight the misuse of tracking devices. Apple applied updated protections against stalking in iOS 17.5, which is still in beta. 

This article originally appeared on Engadget at https://www.engadget.com/googles-long-awaited-find-my-device-network-launches-today-160014930.html?src=rss

Weather Update, April 8, 11:45 AM ET: The weather forecast in the story below still largely holds, but things are more unsettled in the southern US, with forecasts now calling for thunderstorms from Dallas up to Indianapolis. So, keep that potential danger in mind (and keep an eye on forecasts) when making eclipse plans. 

Elsewhere, the best chance of good viewing along the path of totality is still in northeastern parts of the US (Buffalo, NY, Burlington, VT), along with southeast Canada (Niagara Falls and Montreal), according to Accuweather. However, as of this morning, Apple’s weather app is indicating cloudy skies for many parts of the area, including Syracuse, NY and Jersey City, NJ. In the Midwest (Cleveland), there’s a higher chance of rain than before (58 percent), but no storms currently predicted.

Original story continues below

On April 8, a solar eclipse will darken the skies. This is a rare astronomical event: The last North American total solar eclipse was on August 21, 2017, and there won’t be another on visible on the continent until 2044. The path of totality — where the sun will be fully blocked by the moon — covers over 30 million people in the US, Canada and Mexico.

Those lucky folks may see the sun’s corona and a “diamond ring” — both dramatic sights. Other regions will experience partial eclipses, with the level depending on how close you are to totality. Watching the moon eat into the sun, even a bit, is still a spectacular sight.

So, which cities and regions will experience totality, and when? What’s the weather forecast in those areas? And if you do have a clear view, how can you safely watch and record the event?

Where in the US will you experience the solar eclipse totality, and when?

The good news is that many major centers are in the 100-mile-wide band of totality, so millions of people will be able to see a full solar eclipse. It follows a northeast path, so Mexico’s Pacific coast will get the first views in Mazatlan starting at around 10:57 AM PDT (total eclipse starting at 12:07 PDT), followed by the city of Torreón (all times local).

The total eclipse moves into the United states at 12:10 PM CDT (Eagle Pass, Texas), then hits Austin, Fort Worth and Dallas — three out of five of the most populous Texas cities. From there, it moves into Little Rock, Arkansas, followed by select parts of Missouri, Illinois and Indiana (including Indianapolis).

NASA

Ohio cities Dayton, Toledo and Cleveland get the full show, followed by Erie, Pennsylvania, then Buffalo, Rochester and Syracuse in New York along with Maine. Canada is in on the fun too, with parts of southern Ontario (Hamilton, Niagara Falls) and Quebec (Montreal) getting the totality, along with New Brunswick, PEI and finally, Bonavista, Labrador at 4:03 PM NDT (Newfoundland Time).

If you’re elsewhere on the continent and can’t travel, know that the closer you are to the band of totality, the more the sun will be obscured by the moon (this map shows how much of the eclipse you’ll get depending where you are on the continent).

An impressive list of major centers are within 200 miles of totality, so they’ll get a 90 percent or better eclipse (Houston, St. Louis, Memphis, Nashville, Chicago, Cincinnati, Detroit, Toronto, New York, Boston).

Anyone in the US south, midwest and northeast should get a decent spectacle, as will folks in Canada’s southeast and Atlantic coast. Even if you’re not in those regions, you might still see (and can capture) a mini eclipse.

How long will the 2024 solar eclipse last?

From the beginning when the moon first starts to cover the sun (partial eclipse) until the end when the two bodies part ways is a good long time – up to two hours and forty minutes in Dallas, and 2:18 in Caribou, Maine.

However, totality itself is brief, with the duration dependent on how close you are to the center of the totality band and the time of day. It’s at just under four minutes in Dallas, less than three minutes in Presque Island, Maine and a mere minute and 12 seconds in Montreal. As such, you’ll need to be ready and hope that the skies are clear during that brief window.

What’s the weather forecast in my area?

It’s still early for an accurate forecast, but a week is enough to get a general idea by region. Suffice to say, April isn’t the ideal month for clear skies. That said, an eclipse can still be visible through light cloud cover, and even if it’s thick, the sky will grow dramatically dark.

Unfortunately, the odds of precipitation are indeed above average across most of the band of the eclipse. Forecasts predict that the chances for clear skies are better the farther northeast you live, the opposite of historical trends.

To wit, Dallas has showers forecast throughout the day (58 percent), which would mean continuous cloud cover and no clear view if that holds. That improves a bit when you get to Indianapolis (partly cloudy, 24 percent chance of rain), with things better still in Buffalo, New York (partly cloudy, 11 percent).

Things are looking good right now in Montreal, though, with mostly sunny skies and only a 9 percent chance of rain, and the same goes for Fredericton, New Brunswick.

Niagara Falls also figures to have decent weather during the eclipse (mostly sunny, 18 percent) and is in the path of totality, which has led to the city declaring a state of emergency out of caution. Officials estimate that a million people could pour into the area, creating potentially dangerous crowds.

How can I watch the solar eclipse at home?

Staring at the sun is obviously dangerous for your vision, and doing so during an eclipse can be just as harmful. Even though you may not feel discomfort immediately, you may damage your eyes via an affliction called solar retinopathy. That can lead to serious consequences like eye pain, blind spots, blurred vision and more.

American Astronomical Society

To view it safely, you must purchase a pair of approved solar eclipse glasses based on an international safety standard called ISO 12312-2 (regular sunglasses won’t do). That dictates the maximum luminous transmittance, along with the range of permissible wavelength transmittance (UVA, UVB and infrared).

There’s certainly still time to grab a pair if you don’t have them already. The American Astronomical Society (AAS) has many recommendations for manufacturers and vendors, both online and at retail chains.

Warby Parker, for one, is offering free glasses (limit two per person while supplies last). You can also find them at Staples, Lowes and Walmart, or online at B&H and multiple science and astronomy stores.

The AAS advises against searching for the lowest price on Amazon or eBay, however, in case you get a bad knock off. “Before you buy a solar viewer or filter online, we recommend that you make sure that (1) the seller is identified on the site and (2) the seller is listed on this page,” it says on its Solar Eclipse Across America site.

How to watch the solar eclipse safely without glasses

Canadian Space Agency

It’s possible to view an eclipse without glasses via indirect means, as well. The simplest way is by punching a small round hole in a piece of thick paper or cardboard, then positioning it so the sun shines through the hole onto the ground or a flat surface (you can also attach a piece of foil with a hole, as NASA shows here). That will project an image of the Sun’s disc, letting you see the eclipse in real time.

The same pinhole principle would let you use anything with perforated holes, like a colander, projecting dozens of tiny eclipses on a surface. Trees can do the same thing, casting weird leaf shadows with little solar eclipse chunks out of them.

Benjamin Seigh/Wikimedia

For a bit better experience, you can build a crude box projector. With that, the sun shines through a hole in tin foil onto a white card, and you can look through a larger hole at the card, with the sun behind you. The Canadian Space Agency explains exactly how to make that.

Never, ever view an eclipse directly through a pair of binoculars or a telescope, as that’s a guaranteed way to damage your eyes. That said, you can use a pair of binoculars or a telescope to project the sun onto a piece of paper, as shown in this video.

How to take photos or video of the solar eclipse

Unfortunately, you can’t just point your smartphone or camera at the sun to record the eclipse, as the brightness will overwhelm the sensor and ruin the image (and possibly damage the sensor). Luckily, you can shield your camera just as you do your eyes.

The cheapest way to do that is to buy an extra set of eclipse glasses, then cut out an eyepiece from one and tape it over the smartphone (or other camera) lens. That will reduce the light levels enough to see detail in the sun throughout the partial eclipse and totality.

You can also purchase dedicated smartphone solar filters like the VisiSolar Photo Filter, which are designed for cameras and not direct viewing. Another choice is the Solar Snap Eclipse App Kit, which also offers an app that aids in photographing the eclipsed sun. It’s advisable to also wear solar glasses when setting up your smartphone or camera to protect your eyes.

If you’re shooting the eclipse with a dedicated mirrorless or DSLR camera, you’ll need either a mylar, 16-stop ND (neutral density) or hydrogen alpha solar filter. Again, do not look directly into a DSLR’s optical viewfinder at the sun if the lens doesn’t have one of those filters attached (the electronic viewfinder on a mirrorless camera is safe).

To photograph the eclipse with a smartphone, turn the flash off and put the camera into ultrawide or wide mode so it stays in frame. Do NOT look directly at the sun to line up your camera if you’re not wearing solar eclipse glasses.

Don’t use the digital zoom to try to make the eclipse bigger, as you’ll lose resolution (you can zoom in later in your photo editing app). Once focus is set on the sun, use your smartphone’s focus lock feature so that it doesn’t “hunt” for focus and blur the eclipse.

During totality, the “diamond ring” effect only lasts a split second, so use the burst mode of your camera or you’ll likely miss the shot. And try to capture RAW (rather than JPEG) images to keep the maximum detail possible for later editing. Some iPhone and Android smartphones have RAW capability built-in, if not, you can use a third-party app.

If you decide to capture video, you’ll need a filter as well, of course. But you should also use a tripod, as shooting handheld will induce blur and result in a shaky video. Even a cheap tripod will do the trick, along with a simple smartphone holder. Capture the highest resolution you can (4K or even 8K) at the highest quality possible. You’ll also capture any cheering, shouting, etc. — a precious souvenir you can look back on again and again.

More resources

There are plenty of government and private sites with more information about the eclipse, starting with the AAS’s eclipse site, detailing things like eye safety, imaging, resources and even a totality app — an “interactive map that shows what you’ll see at any location in North America for the total solar eclipse of April 8, 2024.”

NASA also offers a dedicated site for the North American Eclipse, as does the National Weather Service and National Solar Observatory. A private site called Great American Eclipse is largely commercial, but does have a very useful map showing the band of totality and how much of the eclipse you’ll see depending on location, along with a comprehensive list of eclipse times and durations by city.

Update, April 5, 12:30PM ET: This story was updated after publishing to include more details about the total solar eclipse’s path of totality.

This article originally appeared on Engadget at https://www.engadget.com/solar-eclipse-2024-how-to-watch-and-record-the-total-eclipse-on-monday-163035394.html?src=rss