November 26, 2019 Volume 15 Issue 45

Electrical/Electronic News & Products

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EV automotive fuse safely interrupts up to 1000 VDC

High voltages and high currents occur in electric vehicles in numerous places. Their battery packs with several thousand rechargeable cells store enormous amounts of energy in order to provide for the demands of drive performance and distance, with the shortest possible charging times. Such applications require highly reliable fuses to safeguard this power. SCHURTER has just launched its AEO 10.3 x 38 mm mini-fuse series, particularly suited for battery protection in electric vehicles. The AEO series safely interrupts short-circuits up to 20 kA at 1000/800 VDC, with a current rating range of 10 to 50 A. SCHURTER's new, patented contact welding process guarantees the highest reliability and overcomes inherent weaknesses in solder joints.
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World's smallest image sensor

The OV6948 from OmniVision Technologies is the new winner of the Guinness World Record for "The Smallest Image Sensor Commercially Available" at a diminutive 0.575 x 0.575 mm. The company developed the tiny sensor to address the market demand for decreased invasiveness and deeper anatomical access in medical devices. OmniVision also offers the companion OVM6948 CameraCubeChip, a fully packaged, wafer-level color camera module measuring 0.65 x 0.65 mm, with a z-height of just 1.158 mm -- shown here next to a single peppercorn. The OVM6948 is the only ultra-small "chip on tip" camera with backside illumination, which provides excellent image quality and better low-light performance.
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Most advanced LIDAR sensor on the market

Velodyne's new Alpha Prime LIDAR sensor has a unique combination of breakthrough innovations that allows vehicles to navigate in unfamiliar and dynamic settings. It uses patented surround-view technology to deliver the combined highest performance specifications for the autonomous mobility industry in one sensor -- with reflectivity returns from over 4.8 million points per sec. Velodyne says this sensor is an unmatched solution in perception, field-of-view, and range for autonomous markets such as transportation, trucking, and robotics. It also offers a new level of power efficiency. Available now for orders and delivery.
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Voice capture at 4x the distance

Texas Instruments has just introduced a new audio analog-to-digital converter (ADC) capable of capturing clear audio up to four times farther away than competing devices. The TLV320ADC5140 is the industry's smallest quad-channel audio ADC with this level of performance. The device is part of a new family of three TI Burr-Brown audio ADCs that enable low-distortion audio recordings in loud environments, along with far-field, high-fidelity recordings in any environment. Applications include high-end smart speakers, sound bars, wireless speakers, high-def TVs, IP network cameras, teleconferencing systems, and smart appliances.
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Powerful LED curing lamp for tight work spaces

DELO now offers a compact LED curing lamp for use in industrial applications with limited work space. The powerful DELOLUX 503 is designed to bond small surfaces, like cameras used in autonomous cars, within seconds on serial production lines. The new lamp directs light diagonally downward so that it does not need to be installed at level with the components that need to be bonded. This gives more moving space to axes or grippers and helps to integrate complex systems. The UV lamp ensures high process reliability through continuous intensity control, internal control, and monitoring of important parameters like LED temperature. Up to four LED heads can be controlled by DELO controllers or by an external PLC, allowing the adhesive to be evenly exposed from several angles.
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Cool Tools: Videoscopes with tons of options

A new line of industrial videoscopes from Titian Tool Supply features inter-changeable video probes that allow for the use of different insertion tube lengths and diameters with one video unit. There are 5 different models with 3 diameter sizes and 3 lengths available. TVG-PRO Series videoscopes feature a 5-in. LCD monitor and have either 180° or full 360° articulation. They are designed for on-site inspections and maintenance on a wide range of transportation equipment, including aviation, locomotive, and gas and diesel engines; machinery, manufacturing, and metalworking, including inspections of castings and cavities; pipeline and container manufacturing; as well as power generation.
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Bend the rules of lighting design: Cut and form LED sheets

VCC is bending the rules of lighting design with its new VentoFlex tiles. The VentoFlex modular lighting system opens up countless ways for architects and lighting designers to make an impact. Available in 12-in. x 12-in. sheets, these innovative LED tiles can be cut and formed around any design element, including rounded corners and tight spaces, without taking up much room at all -- just 0.15 in. (3.81 mm). A pair of scissors is the only tool required to cut VentoFlex tiles to the size and shape you desire. Ten or 15 tiles can be linked together to one driver and dimmer to create thousands of square inches of versatile lighting power! This product is in the running for the 2019 Elektra Awards LED Product of the Year in Europe.
Learn more about this new and exciting lighting technology.


Compact hydraulic/pneumatic position sensors

Novotechnik's TM1 Series of position sensors are designed for use in hydraulic and pneumatic cylinders -- especially in tight-space applications. They are based on magnetostrictive technology and are available in screw flange or plug-in flange models. A ring-shaped magnetic marker moves up and down the sensor's shaft for touchless operation. Specs include stroke lengths from 50 to 2,000 mm (1.9 to 78.7 in.) and accuracy to +/-0.04 percent.
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Spark-proof EC fans use 50% less energy

Orion Fans has extended its electronically commutated (EC) fan product offering to include a 254-mm IP68-ATEX-rated version for waterproof and harsh environment applications. The low-power OA254EC-ATEX Series EC fan combines energy conservation with maximum protection for power-hungry applications involving explosive atmospheres or flammable gases. It delivers air flows of 500 to 830 CFM. EC fans can be used in most any AC fan application with the added benefit of power savings of up to 50 percent. EC fans often enable customers to meet energy-consumption requirements from agencies like ENERGY STAR. Ideal as a drop-in replacement for AC fans, the larger OA254 IP68-ATEX Series EC fans are suited for oil & gas applications including oil rig and oil refining equipment. The fans are also used in walk-in refrigeration systems, commercial display coolers, EV and charging systems, servers, food services equipment, and other applications.
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Protect vulnerable electronics from voltage transients and lightning events

Littelfuse has released a new series of higher surge TVS Diode products in a DO-214AB package. The 8.0SMDJ series is optimized to protect sensitive electronic equipment from transient voltage induced by lightning and other voltage events. Because it combines up to 8,000 W of peak pulse power dissipation in a compact DO-214AB SMC package, the 8.0SMDJ series offers circuit designers a high-surge, space-saving circuit protection solution that can simplify printed circuit board design and improve reliability significantly. Typical markets and applications include: home appliances, consumer electronics, industrial, data centers, AC and DC protection, and PoE protection.
Learn more.


No-wear flat magnetic angle sensors

Novotechnik U.S. has just introduced the Vert-X 05E Series of magnetic rotary position sensors with compact, flat housing. Interfaces include analog, SPI, and incremental. The series is available in single and redundant versions. The sensors are touchless magnetic angle sensors with a permanent magnet that can be secured to an application's rotating shaft, so there is no direct mechanical linkage between the shaft and the measuring system -- and therefore no wear. Key specifications for Vert-X 05E include 5-mm profile, 0 to 360° measurement range, repeatability of 0.1° or better, and maximum hysteresis of 0.1°. Sample rate is up to 5 kHz, and its active measurement region extends to within 6 mm from edge of housing.
Learn more.


High-speed image sensor for AI, drones, robotics

ON Semiconductor has introduced the ARX3A0 digital image sensor with 0.3 Mega-Pixel (MP) resolution in a 1:1 aspect ratio. With up to 360 frames per second (fps) capture rate, it can perform like a global shutter in many conditions but with the size, performance, and responsivity benefits of being a Back-Side Illuminated (BSI) rolling shutter sensor. With its small size, square format, ultra-low-power requirement, and high frame rate, the ARX3A0 is particularly suitable for emerging Machine Vision, Artificial Intelligence, IOT, drones, robotics, and AR/VR applications, as well as small supplemental security cameras.
Learn more.


Can electrical resistance be used to predict shielding effectiveness?

Conductive elastomer EMI shielding gaskets use metallic particles to create a conductive path and shield enclosures from electromagnetic radiation. Gaskets with silver particles, which are very conductive, often outperform gaskets with graphite particles. However, this is not always the case. A common misconception is that a measurement of DC resistivity can directly predict shielding effectiveness. Ben Nudelman, market development engineer at Parker, explains why.
Read this informative Parker Hannifin blog.


Standard and custom process heaters -- fast delivery

Durex builds standard as well as custom heaters for a host of applications and industries, including power plants, oil and gas, chemical and petrochemical, pharmaceutical, plastics, packaging, heat treating, cleaning and plating, aerospace, semiconductor processing, and food service equipment. The Cary, IL, company now offers screw plug, flange immersion, and circulation heaters with fast-turn shipping capabilities. Durex uses product platforms to provide standard "catalog" type designs as well as customized designs in the same fast turnaround window. Plug heaters ship in 3 to 5 days. Flange heaters ship in 5 to 7 days. Circulation heaters in 9 to 12 days. No upcharge for customized units or "non-standard" configurations.
Learn more.


Cool Tools: Fluke revamps industrial thermal camera line

Fluke has retooled its entire line of industrial thermal cameras with more premium features packed into every model, providing higher value for the customer and allowing the company to reduce the number of cameras it offers to simplify the buying process. From an industrial pocket thermal imager to a line-up of 640 x 480 resolution infrared cameras, these tools take professional inspections to the next level.
Read the full article.


Design flaw could open Bluetooth devices to hacking

Mobile apps that work with Bluetooth devices have an inherent design flaw that makes them vulnerable to hacking, new research has found.

The problem lies in the way Bluetooth Low Energy devices -- a type of Bluetooth used by most modern gadgets -- communicate with the mobile apps that control them, said Zhiqiang Lin, associate professor of computer science and engineering at The Ohio State University. Lin presented the findings recently at the Association for Computing Machinery's Conference on Computer and Communications Security (ACM CCS 2019).

"There is a fundamental flaw that leaves these devices vulnerable -- first when they are initially paired to a mobile app, and then again when they are operating," Lin said. "And while the magnitude of that vulnerability varies, we found it to be a consistent problem among Bluetooth Low Energy devices when communicating with mobile apps."

Consider a wearable health and fitness tracker, smart thermostat, smart speaker, or smart home assistant. Each first communicates with the apps on your mobile device by broadcasting something called a UUID -- a universally unique identifier. That identifier allows the corresponding apps on your phone to recognize the Bluetooth device, creating a connection that allows your phone and device to talk to one another.

But that identifier itself is also embedded into the mobile app code. Otherwise, mobile apps would not be able to recognize the device. However, such UUIDs in the mobile apps make the devices vulnerable to a fingerprinting attack, Lin and his research team found.

"At a minimum, a hacker could determine whether you have a particular Bluetooth device, such as a smart speaker, at your home, by identifying whether or not your smart device is broadcasting the particular UUIDs identified from the corresponding mobile apps," Lin said. "But in some cases in which no encryption is involved or encryption is used improperly between mobile apps and devices, the attacker would be able to 'listen in' on your conversation and collect that data."

Still, that doesn't mean you should throw your smartwatch away.

"We think the problem should be relatively easy to fix, and we've made recommendations to app developers and to Bluetooth industry groups," he said.

After Lin and his team realized Bluetooth devices had this built-in vulnerability, they wanted to see how widespread it might be in the real world. They built a "sniffer" -- a hacking device that can identify Bluetooth devices based on the broadcasting messages sent by the devices.

"The typical understanding is that Bluetooth Low Energy devices have signals that can only travel up to 100 meters," he said. "But we found that with a simple receiver adapter and amplifier, the signal can be 'sniffed' (or electronically found) much farther -- up to 1,000 meters away."

They then drove the "sniffer" around a 1.28-sq-mile area near Ohio State's campus to field-test the vulnerability. They found more than 5,800 Bluetooth Low Energy devices. Of those, about 5,500 -- 94.6 percent -- were able to be "fingerprinted" (or identified) by an attack and 431 -- 7.4 percent -- were vulnerable to unauthorized access or eavesdropping attacks.

Those that were vulnerable to unauthorized access had issues with the initial "fingerprinting" between device and phone app that put them at risk of hacking. "It was in the initial app-level authentication, the initial pairing of the phone app with the device, where that vulnerability existed," Lin said. If app developers tightened defenses in that initial authentication, he said, the problem could be resolved.

The team reported their findings to developers of vulnerable apps and to the Bluetooth Special Interest Group, and created an automated tool to evaluate all of the Bluetooth Low Energy apps in the Google Play Store -- 18,166 at the time of their research. In addition to building the databases directly from mobile apps of the Bluetooth devices in the market, the team's evaluation also identified 1,434 vulnerable apps that allow unauthorized access, a number that surprised Lin. Their analysis did not include apps in the Apple Store.

"It was alarming," he said. "The potential for privacy invasion is high."

These devices know a lot about us -- they are the wearable technologies that track our steps and our heart rates; the speakers that "hear" us and play songs we want to hear, or give us an easy way to order new things off the internet.

Lin's research focuses on vulnerabilities in tech, trying to identify those potential security gaps before they become true security problems. Earlier this summer, he and researchers at the Georgia Institute of Technology found more than 1,600 vulnerabilities in the support ecosystem behind the top 5,000 free apps in the Google Play Store.

This work was supported in part by the National Science Foundation.

Source: The Ohio State University

Published November 2019

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