It is often a surprise to see how other people react to mains electricity when they

It is often a surprise to see how other people react to mains electricity when they encounter it in a piece of equipment. As engineers who have dealt with it both personally and professionally for many years it is easy to forget that not everyone has had that experience. On one hand we wince at those who dive in with no fear of the consequences, on the other we are constantly surprised at the number of people who treat any item with more than a few volts in it as though it was contaminated with radioactive anthrax and are scared to even think about opening it up. We recently had a chat among the Hackaday writers about how we could approach this subject. The easy way out is to be all Elf-and-Safety and join the radioactive anthrax crowd. But the conclusion we came to was that this site is a resource for hackers and makers. Some of you are going to lift the lid on boxes containing significant voltages no matter what, so we thought we’d help you do it safely rather than just listen for the distant screams. So here follows the first in a series on how to approach electronic devices containing high voltages, and live to tell the tale. By “high voltages” we mean anything up to mains v...

Killer Deal: Take $280 Off the Stylish Yoga C630 2-in-1 laptop

Lenovo’s Labor Day laptop sale is filled with excellent bargains. Power users, for example, can take up to $1,350 off the manufacturer’s entire ThinkPad X1 Carbon line. Meanwhile, frequent flyers can stay productive — and connected — with the newly discounted C630. Currently, you can buy the Lenovo Yoga C630 2-in-1 for $659.99 via coupon code “YOGAC630″. Normally priced at $939.99, that’s $280 off and the best price we could find for this configuration.  It features a 13.3-inch 1080p IPS multi-touch display, 2.96GHz Snapdragon 850 CPU, 8GB of RAM, and a 128GB SSD. It also has built-in LTE connectivity, although a separate data plan is required for connectivity. With its aluminum chassis and Iron Grey finish, the Yoga C630 has the same minimalist yet elegant look of Lenovo’s Ideapad 530S and Yoga C930 laptops. Under the lid is a full-size keyboard with dual speaker grills on either side. Incorporated into its design are 360-degree rotating hinges so you can easily configure the Yoga C630 from laptop to tablet mode. It has two USB-C port and a headphone/mic jack as well as SIM card holder for optional 4G LTE connectivity.  At 2.7 pounds and 12.1...

Blacklick Township farmers preserve nearly 100 acres of agricultural land | News

Please purchase a subscription to read our premium content. If you have a subscription, please log in or sign up for an account on our website to continue. Thank you for reading! On your next view you will be asked to log in or subscribe to continue reading. Thank you for Reading! On your next view you will be asked to log in to your subscriber account or create an account and subscribepurchase a subscription to continue reading. Thank you for reading! We hope that you continue to enjoy our free content.To view unlimited content Subscribe now or Login Thank you for reading! We hope that you continue to enjoy our free content.To view unlimited content Subscribe now or Login Thank you for reading! We hope that you continue to enjoy our free content.To view unlimited content Subscribe now or Login Thank you for reading! We hope that you continue to enjoy our free content.To view unlimited content Subscribe now or Login Thank you for reading! We hope that you continue to enjoy our free content.To view unlimited content Subscribe now or Login Checking back? Since you viewed this item previously you can read it again. To view unlimited content Subscribe now or Login Please purchase a...

This 155Wh portable power station can recharge a MacBook + more: $87 (33% off)

ENKEEO (99% positive lifetime feedback) via Amazon is offering its 155Wh Portable Power Station for $87.09 shipped when the code 33QXEJAA is used at checkout. This is 33% off its regular rate of $130 and is a match for our last mention. Users will find two AC outlets with a maximum output of 100W here, alongside two DC outputs, a USB QuickCharge plug and two USB-A ports with 2A charging capabilities. With 155Wh of battery capacity, you’ll be able to run small household appliances, computers, and more off of this portable battery. Rated 4.2/5 stars. Ditch the AC outlets and other high-power capabilities and opt for the Anker PowerCore 5000 Portable Charger at $18 Prime shipped. It can recharge your phone or tablet and fits in your purse or pocket easily. Just know it won’t be able to give your laptop or mini-fridge the power it needs to run. Press & HOLD the light button for 3 seconds & the LED flashlight will come on. AC/DC/QC3.0 USB OUTPUTS: built with 2 x AC outlet (max 100W); 2 x DC port (12V/10A, max 15A); 1 x USB QC3.0 (5-9V/2A) and 2 USB ports (5V/2A); able to charge laptops, phones, cameras, fans and other electronic gadgets and appliances. PORTABLE POWER SOURCE: ...

Best towels: The best bathroom, beach and gym towels from under £8

What could possibly be complicated about buying a towel? A fair bit, actually. That fluffy fabric sheet needs to work for you on several levels: it needs to dry you off quickly, not shed whilst doing so, offer softness and comfort, look good in your bathroom, wash well in the machine and last for years. All that before we even get to considering personal taste. Some people prefer a heavy, thick-piled bath sheet in which to envelope themselves (and/or their kids). Others favour a lightweight towel to stick in their gym bag, or a contemporary waffle-knit that looks stylish and dries quickly. There’s no “one size fits all” when it comes to towels. So, for this review, we’ve picked five towels that fit those differing needs, from beach towels that make a statement to a more classic style for bathroom comfort. Before we reveal our favourites, here are our tips to ensure you make a top-notch towel purchase. Yes. A big, fluffy hotel-style towel will add a touch of luxury to your bathroom but will be too cumbersome to take to the gym; even more so to bring back home when it’s damp. So here’s a quick towel-type summary. Bath towels need to be absorbent and comfort...

What is ‘blobology’ and how is it transforming biology?

Spectacularly detailed videos from an advanced microscope are sparking a biology “revolution”, scientists say. But now, it is being used to create videos of the body’s inner-workings at a hitherto unseen level of detail. This new view inside the body is likely to accelerate the development of more effective drugs for dementia and infection. According to Dr Peter Rosenthal, of the Francis Crick Institute in London, there is a “growing buzz” about the potential of the technology. “It’s been described as a ‘resolution revolution’. There is an exponential growth in the number of new images and 3D maps being produced and researchers are clamouring to be trained how to do it.” But it was not always so for the technique, called cryo-electron microscopy, or cryo-EM for short. It was seen as a wacky alternative to other techniques for decades. This was because the resulting images were little more than blobs – hence the rude description of “blobology” by its detractors. But over time, scientists refined cryo-EM to the point that it earned a Nobel Prize for chemistry in 2017. But, crucially, there was a perfect ...

The murky world of international espionage has long captivated the public in the form of entertainment

The murky world of international espionage has long captivated the public in the form of entertainment and popular fiction. The works of Ian Fleming and John le Carre can be found in bookshops around the world and adaptations fill cinemas. But the reality is sometimes stranger than fiction. In the 1980s, the US government lost congressional support for funding the Contras in Nicaragua and, as an alternative means of funding, had the CIA use secret channels. These secret channels went as far as trading arms with Iran, sometimes as part of exchanges for American hostages, and allowing Nicaraguan drug traffickers to operate with impunity. These revelations emerged in US Senate investigations in the late 1980s. The CIA’s former Latin America division chief, Duane Clarridge, later told journalist John Pilger: “We’ll intervene whenever we decide it’s in our national security interests to intervene”. The depth of the operation may never be fully known. Slag Pots, Casting Ladle, Ingot Mold, Vertical Mill, Casting Moulds – Special Metal,http://www.special-metal.com/

Find Waldo Finale Held At Neighborhood Reads — Over 175 Completed the Search | Washington

Please purchase a subscription to read our premium content. If you have a subscription, please log in or sign up for an account on our website to continue. Hundreds of seekers took to the streets of Downtown Washington in July in search of Waldo –— the iconic children’s book character in the striped shirt and black-rimmed specs who’s become a star of summer campaigns organized by bookstores across the country. Find Waldo Local is organized by Neighborhood Reads bookstore to support local businesses and the Shop Local movement. This was the third year for the downtown event, which concluded Wednesday, July 31, with a finale event at the bookstore. More than 175 seekers, mostly children, completed the search for the 6-inch Waldo, visiting at least 20 of the 24 local businesses to collect stamps on their project passport. Participating business this year were Addi’s, Bryan Haynes Studio, Exit 11, Fischer’s Food Shop, Four Rivers YMCA, Four Seasons Florist, Gary R. Lucy Gallery, IB Nuts & Fruit Too, Loyal Bella, Main Street Creamery, Missouri Meerschaum, Mommy & Me . . . Again, Olivino’s Tasting Bar, The Painted Home, Plush Home & Fashion, Schroeder Drug, Vintage T...

Turbine blade milling for medium-to-large jet engines

Critical aerospace engine turbine fan blades and high-bypass turbines produce much of the forward thrust. In the past, precision-forged blades needed only light finishing to achieve tolerances. Growing requirements for fuel efficiency now demand tighter tolerances, and many manufacturers have responded by machining oversize forgings to final net shape. Typically machined from titanium alloys, newer blade materials include aluminum and carbon-fiber composites. Carbon-fiber blades attach titanium leading edges to the relatively brittle composite material – a design element minimizing damage if an engine ingests foreign objects. Titanium aluminide used in blades in the low-pressure sections of some new engines is very brittle but provides high heat resistance. Futuristic materials and the complex shapes required to securely unite them into a single turbine blade need equally futuristic machining processes – particularly when it comes to machine movement. Changing direction quickly is important in machining as it is in auto racing. On a straight track, acceleration and deceleration are relatively simple, but when the track turns, the car must decelerate to negotiate the corner and a...