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Intro to reed switches, magnets, magnetic fields

This brief introductory video on the DigiKey site offers tips for engineers designing with reed switches. Dr. Stephen Day, Ph.D. from Coto Technology gives a solid overview on reed switches -- complete with real-world application examples -- and a detailed explanation of how they react to magnetic fields.
View the video.

Bi-color LEDs to light up your designs

Created with engineers and OEMs in mind, SpectraBright Series SMD RGB and Bi-Color LEDs from Visual Communi-cations Company (VCC) deliver efficiency, design flexibility, and control for devices in a range of industries, including mil-aero, automated guided vehicles, EV charging stations, industrial, telecom, IoT/smart home, and medical. These 50,000-hr bi-color and RGB options save money and space on the HMI, communicating two or three operating modes in a single component.
Learn more.

All about slip rings: How they work and their uses

Rotary Systems has put together a really nice basic primer on slip rings -- electrical collectors that carry a current from a stationary wire into a rotating device. Common uses are for power, proximity switches, strain gauges, video, and Ethernet signal transmission. This introduction also covers how to specify, assembly types, and interface requirements. Rotary Systems also manufactures rotary unions for fluid applications.
Read the overview.

Seifert thermoelectric coolers from AutomationDirect

Automation-Direct has added new high-quality and efficient stainless steel Seifert 340 BTU/H thermoelectric coolers with 120-V and 230-V power options. Thermoelectric coolers from Seifert use the Peltier Effect to create a temperature difference between the internal and ambient heat sinks, making internal air cooler while dissipating heat into the external environment. Fans assist the convective heat transfer from the heat sinks, which are optimized for maximum flow.
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EMI shielding honeycomb air vent panel design

Learn from the engineering experts at Parker how honeycomb air vent panels are used to help cool electronics with airflow while maintaining electromagnetic interference (EMI) shielding. Topics include: design features, cell size and thickness, platings and coatings, and a stacked design called OMNI CELL construction. These vents can be incorporated into enclosures where EMI radiation and susceptibility is a concern or where heat dissipation is necessary. Lots of good info.
Read the Parker blog.

What is 3D-MID? Molded parts with integrated electronics from HARTING

3D-MID (three-dimensional mechatronic integrated devices) technology combines electronic and mechanical functionalities into a single, 3D component. It replaces the traditional printed circuit board and opens up many new opportunities. It takes injection-molded parts and uses laser-direct structuring to etch areas of conductor structures, which are filled with a copper plating process to create very precise electronic circuits. HARTING, the technology's developer, says it's "Like a PCB, but 3D." Tons of possibilities.
View the video.

Loss-free conversion of 3D/CAD data

CT CoreTech-nologie has further developed its state-of-the-art CAD converter 3D_Evolution and is now introducing native interfaces for reading Solidedge and writing Nx and Solidworks files. It supports a wide range of formats such as Catia, Nx, Creo, Solidworks, Solidedge, Inventor, Step, and Jt, facilitating smooth interoperability between different systems and collaboration for engineers and designers in development environments with different CAD systems.
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Top 5 reasons for solder joint failure

Solder joint reliability is often a pain point in the design of an electronic system. According to Tyler Ferris at ANSYS, a wide variety of factors affect joint reliability, and any one of them can drastically reduce joint lifetime. Properly identifying and mitigating potential causes during the design and manufacturing process can prevent costly and difficult-to-solve problems later in a product lifecycle.
Read this informative ANSYS blog.

Advanced overtemp detection for EV battery packs

Littelfuse has introduced TTape, a ground-breaking over-temperature detection platform designed to transform the management of Li-ion battery systems. TTape helps vehicle systems monitor and manage premature cell aging effectively while reducing the risks associated with thermal runaway incidents. This solution is ideally suited for a wide range of applications, including automotive EV/HEVs, commercial vehicles, and energy storage systems.
Learn more.

Benchtop ionizer for hands-free static elimination

EXAIR's Varistat Benchtop Ionizer is the latest solution for neutralizing static on charged surfaces in industrial settings. Using ionizing technology, the Varistat provides a hands-free solution that requires no compressed air. Easily mounted on benchtops or machines, it is manually adjustable and perfect for processes needing comprehensive coverage such as part assembly, web cleaning, printing, and more.
Learn more.

LED light bars from AutomationDirect

Automation-Direct adds CCEA TRACK-ALPHA-PRO series LED light bars to expand their offering of industrial LED fixtures. Their rugged industrial-grade anodized aluminum construction makes TRACKALPHA-PRO ideal for use with medium to large-size industrial machine tools and for use in wet environments. These 120 VAC-rated, high-power LED lights provide intense, uniform lighting, with up to a 4,600-lumen output (100 lumens per watt). They come with a standard bracket mount that allows for angle adjustments. Optional TACLIP mounts (sold separately) provide for extra sturdy, vibration-resistant installations.
Learn more.

World's first metalens fisheye camera

2Pi Optics has begun commercial-ization of the first fisheye camera based on the company's proprietary metalens technology -- a breakthrough for electronics design engineers and product managers striving to miniaturize the tiny digital cameras used in advanced driver-assistance systems (ADAS), AR/VR, UAVs, robotics, and other industrial applications. This camera can operate at different wavelengths -- from visible, to near IR, to longer IR -- and is claimed to "outperform conventional refractive, wide-FOV optics in all areas: size, weight, performance, and cost."
Learn more.

Orbex offers two fiber optic rotary joint solutions

Orbex Group announces its 700 Series of fiber optic rotary joint (FORJ) assemblies, supporting either single or multi-mode operation ideal for high-speed digital transmission over long distances. Wavelengths available are 1,310 or 1,550 nm. Applications include marine cable reels, wind turbines, robotics, and high-def video transmission. Both options feature an outer diameter of 7 mm for installation in tight spaces. Construction includes a stainless steel housing.
Learn more.

Mini tunnel magneto-resistance effect sensors

Littelfuse has released its highly anticipated 54100 and 54140 mini Tunnel Magneto-Resistance (TMR) effect sensors, offering unmatched sensitivity and power efficiency. The key differentiator is their remarkable sensitivity and 100x improvement in power efficiency compared to Hall Effect sensors. They are well suited for applications in position and limit sensing, RPM measurement, brushless DC motor commutation, and more in various markets including appliances, home and building automation, and the industrial sectors.
Learn more.

Panasonic solar and EV components available from Newark

Newark has added Panasonic Industry's solar inverters and EV charging system components to their power portfolio. These best-in-class products help designers meet the growing global demand for sustainable and renewable energy mobility systems. Offerings include film capacitors, power inductors, anti-surge thick film chip resistors, graphite thermal interface materials, power relays, capacitors, and wireless modules.
Learn more.

Researchers discover security vulnerabilities in virtual reality headsets

[Photo by Eddie Kopp on Unsplash]

 

 

Researchers at Rutgers University-New Brunswick have published "Face-Mic," the first work examining how voice command features on virtual reality headsets could lead to major privacy leakages, known as "eavesdropping attacks."

The research shows that hackers could use popular virtual reality (AR/VR) headsets with built-in motion sensors to record subtle, speech-associated facial dynamics to steal sensitive information communicated via voice command, including credit card data and passwords.

Common AR/VR systems on the market include the popular brands Oculus Quest 2, HTC Vive Pro, and PlayStation VR.

Led by Yingying "Jennifer" Chen, associate director of WINLAB and graduate director of Electrical and Computer Engineering at Rutgers University-New Brunswick, the study will be presented at the annual International Conference on Mobile Computing and Networking in March. Other research collaborators include Nitesh Saxena of Texas A&M University and Jian Liu at the University of Tennessee at Knoxville.

To demonstrate the existence of security vulnerabilities, Chen and her fellow WINLAB researchers developed an eavesdropping attack targeting AR/VR headsets, known as "Face-Mic."

"Face-Mic is the first work that infers private and sensitive information by leveraging the facial dynamics associated with live human speech while using face-mounted AR/VR devices," said Chen. "Our research demonstrates that Face-Mic can derive the headset wearer's sensitive information with four mainstream AR/VR headsets, including the most popular ones: Oculus Quest and HTC Vive Pro."

The researchers studied three types of vibrations captured by AR/VR headsets' motion sensors, including speech-associated facial movements, bone-borne vibrations, and airborne vibrations. Chen noted that bone-borne vibrations in particular are richly encoded with detailed gender, identity, and speech information.

"By analyzing the facial dynamics captured with the motion sensors, we found that both cardboard headsets and high-end headsets suffer security vulnerabilities, revealing a user's sensitive speech and speaker information without permission," Chen said.

Although vendors usually have policies regarding utilizing the voice access function in headset microphones, Chen's research found that built-in motion sensors, such as an accelerometer and gyroscope within a VR headset, do not require any permission to access. This security vulnerability can be exploited by malicious actors intent on committing eavesdropping attacks.

Eavesdropping attackers can also derive simple speech content, including digits and words, to infer sensitive information, such as credit card numbers, Social Security numbers, phone numbers, PIN numbers, transactions, birth dates, and passwords. Exposing such information could lead to identity theft, credit card fraud, and confidential and healthcare information leakage.

Chen said once a user has been identified by a hacker, an eavesdropping attack can lead to further exposure of user's sensitive information and lifestyle, such as AR/VR travel histories, game/video preferences, and shopping preferences. Such tracking compromises users' privacy and can be lucrative for advertising companies.

Oculus Quest, for example, supports voice dictation for entering web addresses, controlling the headset, and exploring commercial products. Rutgers' Face-Mic research shows that hackers may leverage these zero-permission sensors to capture sensitive information, leading to severe privacy leakages.

Chen said she hopes these findings will raise awareness in the general public about AR/VR security vulnerabilities and encourage manufacturers to develop safer models.

"Given our findings, manufacturers of VR headsets should consider additional security measures, such as adding ductile materials in the foam replacement cover and the headband, which may attenuate the speech-associated facial vibrations that would be captured by the built-in accelerometer/gyroscope," she said.

Chen and her WINLAB colleagues are now examining how facial vibration information can authenticate users and improve security, and how AR/VR headsets can capture a user's breathing and heart rate to measure well-being and mood states unobtrusively.

Source: Rutgers University

Published February 2022

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