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You’d think that something made out of glass and epoxy would transmit a decent amount of light. Unfortunately for [Jeremy Ruhland], it turns out that FR4 is not great light pipe material, at least in one dimension.
The backstory on this has to do with #badgelife, where it has become popular to reverse mount SMD LEDs on areas of PCBs that are devoid of masking, allowing the light to shine through with a warm, diffuse glow – we’ve even featured a through-PCB word clock that uses a similar technique to wonderful effect. [Jeremy]’s idea was to use 0603 SMD LEDs mounted inside non-plated through-holes to illuminate the interior of the board edgewise. It seems like a great idea, almost like the diffusers used to illuminate flat displays from the edge.
Sadly, the light from [Jeremy]’s LEDs just didn’t make it very far into the FR4 before being absorbed – about 15 mm max. That makes for an underwhelming appearance, but all is certainly not lost. Valuable lessons about PCB design were had, like exactly how to get a fab to understand what you’re trying to do with non-plated holes and why you want to fence the entire edge of the board in vias. But best of all, [Jeremy] explored what’s possible with Oreo construction, and came away with ideas for other uses of the method. That counts as a win in our book.
The company’s artificial intelligence segment also experienced increased uptake, with its AI Open Platform growing 37% year on year to having 1.3 million developer accounts. …read more
In the new trailer for season 3, Midge looks as flawless as ever, but it takes work getting her there. The people behind the show’s look share their secrets. …read more
After months of silence on key points, some details may be offering a more complete picture. …read more
An anonymous reader quotes a report from Motherboard: On Wednesday, a gravitational wave called S190814bv was detected by the U.S.-based Laser Interferometer Gravitational-Wave Observatory (LIGO) and its Italian counterpart Virgo. Based on its known properties, scientists think there is a 99% probability that the source of the wave is a black hole that ate a neutron star. In contrast to black hole mergers, neutron star collisions do produce a lot of light. When a gravitational wave from a neutron star crash was detected in 2017, scientists were able to pinpoint bright emissions from the event — called an optical counterpart — in the days that followed the wave detection. This marked the dawn of a technique called “multi-messenger astronomy,” in which scientists use multiple types of signals from space to examine astronomical objects.
Ryan Foley, an astronomer at UC Santa Cruz, was part of the team that tracked down that first optical counterpart, a feat that has not yet been repeated. He and his colleagues are currently scanning the skies with telescopes, searching for any light that might have been radiated by the new suspected merger of a black hole and neutron star. If the team were to pick up light from the event within the coming weeks, they would be witnessing the fallout of a black hole spilling a neutron star’s guts while devouring it. This would provide a rare glimpse of the exotic properties of these extreme astronomical objects and could shed light on everything from subatomic physics to the expansion rate of the universe. “We’ve never detected a neutron star and a black hole together,” said Foley. “If it turns out to be right, then we’ve confirmed a new type of star system. It’s that fundamental.” He added: “If you learn about how neutron stars are built, that can tell you about how atoms are built. This is something that is fundamental to everything in our daily life works.”
of this story at Slashdot.
The National Clinical Terminology Service has been re-engineered to reduce complexities and costs. …read more
Social network’s effort to merge WhatsApp, Messenger and Instagram may help keep the company together too, FTC chief tells the Financial Times. …read more
Tesla has managed to expand its electric-car marketshare, despite two new battery-powered luxury SUVs that have been in U.S. showrooms for the last 10 months: Jaguar’s I-Pace and Audi’s e-tron. Bloomberg reports: Their starts are the latest indications that legacy automakers aren’t assured instant success when they roll out new plug-in models. Tesla’s Model S and X have largely held its own against the two crossovers that offer shorter range and less plentiful public charging infrastructure. Jaguar and Audi also lack the cool factor Musk has cultivated for the Tesla brand by taking an aggressive approach to autonomy and using over-the-air software updates to add games and entertainment features. Tesla’s Model X and Model S each boast more than 300 miles of range, and the cheaper Model 3 travels 240 miles between charges. Jaguar’s $69,500 I-Pace is rated at 234 miles, and Audi’s $74,800 e-tron registers 204 miles.
Jaguar’s marketing team spent years laying the groundwork to introduce the I-Pace. In 2016, the brand joined Formula E, an open-wheeled, electric-powered race circuit similar to Formula One. Porsche and Mercedes-Benz are also joining Formula E for the 2019-2020 season to help generate buzz for the new all-electric models they have coming out. The circuit makes stops in cities including New York, Hong Kong and London, which the brands are banking on as major markets for plug-in cars. But while Formula E is drawing crowds of urban dwellers and a substantial audience on social media, all that buzz may not necessarily translate into showroom traffic.
of this story at Slashdot.