EE World Digital Issues

MICROWAVES AND THE HAVANA SYNDROME The National Academy of Sciences recently released its conclusions about what sickened dozens of American Embassy diplomats in Cuba, a phenomenon dubbed the Havana Syndrome. Though the panel reached no definitive conclusion, it found pulsed RF (a.k.a. directed microwave energy) was the most likely cause. Panel members could not rule…

WELCOME TO OUR FIRST 5G HANDBOOK 5G is more than another wireless technology. It’s changed the radio, the access network, the spectrum, and the network core. It might even change our lives. That’s why EE World created 5G Technology World. We cover 5G technologies on engineering terms. The site launched in January 2020, just as…

Worst suspicions confirmed: The terrible security of internet routers Here’s the latest IDT security nightmare: All of the wireless routers through which most loT traffic passes are probably vul­nerable to botnets and other kinds of security breaches. That’s the conclusion of researchers at Fraunhofer FKIE in Germany who analyzed 127 different routers sold by seven…

Battery breakthrough fatigue For some cheap thrills, try Googling the words “battery breakthrough.” You’ll be presented with page after page of articles breathlessly chronicling one research result after another in energy storage. But you might wonder why, with so many earth-shattering developments, electric vehicles can’t travel 1,000 miles before needing a recharge. The reason: It…

Why lithium batteries won’t fill up landfills Consumers with an inclination toward sustainability have been bummed out over recent revelations that most of the plastics they have carefully separated, washed, and placed in recycling bins typically end up in the local dump. So it may come as good news that dead lithium batteries are increasingly…

Latest connected car feature: Germicidal lights A year ago, had you brought up the idea of adding germicidal lights to a connected car, you probably would have gotten back facial expressions suggesting you’ d lost your mind. Today, the same idea would be more likely to engender a lot of head nodding. Who knew a…

Will your good samaritanism in the pandemic buy you a lawsuit? IF YOU ARE ONE OF THE INDIVIDUALS voluntarily spending your time on technology to help abate the COVID 19 pandemic, consider the experience of the vacuum cleaner company Dyson in the UK. Company founder James Dyson estimates his firm spent about $25 million and…

No, IoT RF radiation won’t cause a pandemic I once had a lengthy exchange with a guy who claimed RF from WiFi was making him sick. After numerous emails back and forth in which I tried to correct his misconceptions about WiFi signals, I gently suggested that he go find an RF screen room and…

Why we don’t need energy efficiency standards for lighting HEADLINES WERE MADE RECENTLY when two national associations dropped a lawsuit attempting to squash light bulb efficiency standards in California. The California standards supposedly save Californians billions of dollars on their energy bills and avoid millions of tons of carbon- warming pollution. The suit was brought…

How to electrocute yourself in a few easy steps Here’s a fun project: Pop open an old microwave oven and scavenge the high-voltage transformer powering the cavity magnetron vacuum tube. Then use it to make yourself a Lichtenberg generator. But be sure there’s someone nearby to call an ambulance. Lichtenberg generators are used to create…

V2Clueless – Next generation of connected apps If you had been watching the Saturday Night Live TV show in mid January of 2012, you would have seen a skit called the Headz Up App. It was an ad for a fictional app aimed at people so distracted by texting on their smartphone that they were…

Will 5G be lethal? Peruse a certain kind of website these days and you’ll find warnings about the lethality of RF transmissions in the frequency ranges slated for 5G networks. One site quotes Devra Davis, director of the Board on Environmental Studies and Toxicology of the U.S. National Research Council, who warns that our sweat…

Everything you thought you knew about IoT security is wrong Listen to the advice being given for securing IoT devices and you are likely to be told that the level of security should be scaled to meet the probable threats. Internet-connected home thermostats, for example, should be designed to prevent compromise by hobbyists and serious…

Now or later? No time for time-of-use energy savings One of the big justifications for smart home electronics and internet-of-things pipedreams is a concept called time-of-use electricity billing. Long used for industrial concerns, the plan is to bring TOU billing to households, so they’ll be charged more for electricity they use during periods of peak…

Don’t let the LED blue light blues get you down TAKE A LOOK at some of the websites devoted to alternative medicine and you’ll likely come across headlines like, “The Dangers of LED & Blue Lights Will Blow Your Mind!” or, “LEDs: The Blue Light Risk,” or “Artificial lighting and the blue light hazard.” These…

Connecting the car is the easy part At the annual conference of the Society of Automotive Engineers, no small number of technical papers cover issues surrounding driver interactions with features on the car dashboard. Touchscreens in particular are a hot topic. You can find SAE papers with impressive-sounding titles such as, Touch Interactive Display Systems:…

Will high test instrument costs keep the next Steve Wozniak out of the tech business? Back in the heyday of personal computing, it was possible to do state-of-the-art work without making a big investment in test equipment. To see what I mean, consider the development of the first 5.25-in. floppy disk drive for the Apple…

Hiring hint: Look for soft skills in young engineers Do schools teach young engineers the right skills? It is easy to find a lot of opinions on that subject from academics. It is more difficult to find assessments from experienced engineers who actually work with new grads. That’s why the comments of Richard Lukaszewski are…

The down side of free samples If you’ve had hassles trying to get component samples for a project, you can thank the efforts of a few enterprising students for making your life more complicated. Here’s a microcosm of what has happened with sample parts: The folks at Texas Instruments used to have a liberal policy…

  The danger of treating autonomous vehicle control as a solved problem A panelist made an interesting comment during the recently concluded TU-Automotive connected car conference near Detroit. It happened during one of the many sessions devoted to software infrastructure and connected services. “In Silicon Valley, autonomous vehicle control and driving is viewed as a…

SEEN A GHOST? BLAME ELECTROMAGNETIC FIELDS WE’D like to think that the average viewer who tunes into a TV show on the SciFy channel called Ghost Hunters might get a laugh out watching investigators prowl around places that are reported to be haunted. But the show participants seem to be completely serious and unconcerned about…

In this issue: 2 The tough problems in power design 8 Teardown: Inside Ikea’s smart LED bulb 28 The basics of thermistors in thermal management 43 How to be smart when selecting a fan for forced air cooling   The tough problems in power design AN ANNUAL RITUAL takes place in the upper echelons of…

In this issue: 22 Energy efficiency in LLC resonant conversion topologies 37 Better thermal design means better efficiency   Energy efficient doesn’t mean cost efficient I once had a root cellar illuminated by a single incandescent light bulb, the kind of bulb that is being phased out thanks to energy efficiency regulations. I would use…

You’d have to say there are a lot of used oscilloscopes floating around. A quick search on eBay recently turned up 16,355 listings for used scopes. A Craigslist search for scopes near me in Cleveland, Ohio found 16 instruments on offer, interesting in that Cleveland is not exactly a capital of high-tech. One wonders if…

In this issue: 8 Teardown: What’s inside a Phillips Sonicare electric toothbrush A novel ac rectification and coil-driving scheme may characterize the electronics found 14 Basics of designing with permanent magnets It can be tricky to correctly specify magnetic materials for power circuits and actuators. 26 Test Instruments help tame power factor and signal integrity…