July 28, 2015 Volume 11 Issue 28

Electrical/Electronic News & Products

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Mini LVDTs offer position feedback for UAVs

Unmanned drones require a variety of sensors to monitor different critical measurements to control flight and maintain aircraft stability. Miniature Linear Position Sensors from NewTek Sensor Solutions provide reliable position feedback for monitoring the fin/rudder position and rotor angle of unmanned aerial vehicles (UAVs) with quick response times, so drones can make adjustments to accurately control flight.
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Cobham introduces spacecraft, satellite electronics

Cobham Advanced Electronic Solutions, a leading provider of electronics technology and services for space and other high-reliability applications, recently released the new LeanREL product family designed to meet the needs of small satellite and non-traditional spacecraft manufacturers. The LeanREL product family, comprised of microprocessors, microcontrollers, as well as memory and interface integrated circuits (ICs), leverages Cobham's 30+ years of radiation-hardened, QML-level reliability, and innovative space systems design expertise and offers an unmatched combination of user benefits.
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Touch panels require 50 percent less input force

Fujitsu Components America has just released a series of customizable, flush-surface, resistive touch panels with less than half the input force of conventional resistive panels, nearly identical to that of projected capacitive panels. The new series (FID-1300 4-wire and FID-1520 5-wire) offers OEMs a cost-efficient alternative to projected capacitive touch panels with a comparable user experience, while maintaining resistive technology's reliable input capability and unlimited choice of input sources. Target applications include industrial automation and HMI machine control, medical equipment, and vehicle navigation systems.
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Automatic vision system with max throughput

The new AV450 Automatic Vision System from L.S. Starrett Company is a versatile, accurate, fast, and American-made 3-axis vision system that allows users to achieve high throughput in their inspection process cost effectively. This heavy-duty CNC video-based measurement system is ideal for both repetitive, larger part-run applications and routine quality assurance in inspection labs, manufacturing, assembly, and research facilities.
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Application Note:
Quadcopter propeller torque/thrust testing

The quadcopter's four propellers are designed to work in conjunction with each other to ensure that there are no torque imbalances that could send the vehicle spinning out of control. But just how would a professional developer or hobbyist perform accurate propeller torque and thrust testing? Advanced sensor specialist FUTEK has the answer.
Read the full article.


Engineer's Toolbox: How to choose the right relay

Relays come in a variety of form factors, styles, and technologies. Depending on your application, only one relay type may be suitable. In other cases, multiple relay types may be appropriate. By understanding the strengths and weaknesses of the different relays, you should be able to pick the one that is best suited for the job at hand. National Instruments lays out the options.
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Cool Tools: New Raspberry Pi 3 Model A+

Fans of the extremely popular credit card-sized computer called Raspberry Pi have something new to celebrate. The line of highly customizable base units has expanded with the third-gen A+ board, which brings the latest features and capabilities to a more compact form factor and lower price point -- only 25 bucks (and we have seen this on sale for under 20)!
Read the full article.


Vandal-resistant sealed switches

C&K has just launched its ATP19 and ATP22 series anti-vandal sealed pushbutton switches. The new high-strength, lightweight switches are IP67/IK10 rated, ensuring their suitability for operation in harsh conditions and ability to withstand potential malicious damage. The switches are also corrosion resistant and offer the industry-standard ring-illuminated version in 19-mm and 22-mm diameters.
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New inductive-technology position sensors

Novotechnik's TF1 Series touchless linear position sensors overcome issues with legacy magnetostrictive technology. They are unaffected by strong magnetic fields and metal flakes or filings present in a user's environment. The TF1 Series consists of an inductively coupled position marker attached to a moving rod/piece of the user's application that requires a position measurement and the sensor with operational and programming status LEDs. While operating, LEDs indicate whether the sensor is operating and the marker within measuring range or out of range, as well as indicating results of internal diagnostics for valid output from the sensor. Can also measure speed and temperature.
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Sensor development kit for power-optimized IoT applications

The RSL10 Sensor Development Kit from ON Semiconductor is designed to provide engineering teams with a comprehensive platform for developing IoT applications with cutting-edge smart sensor technology, enabled by the industry's lowest power Bluetooth Low Energy radio. The kit brings together the highly integrated RSL10 System-in-Package (RSL10 SIP) with a range of advanced low-power sensors from Bosch Sensortec. The development platform provides nine degrees of freedom (DoF) detection and environmental monitoring, including ambient light, volatile organic compounds (VOC), pressure, relative humidity, and temperature. An ultra-low noise digital microphone is also included, along with a user-programmable RGB LED, three programmable push-button switches, and 64 kb of EEPROM. Using the RSL10 Sense and Control mobile application, developers can connect to the RSL10 Sensor Development Kit to monitor sensors and to evaluate the kit's features. The app also supports multiple commercial cloud platforms for uploading sensor data.
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EC fans offer spark-proof IP68-ATEX protection for harsh AC applications

Orion Fans has expanded its family of Electronically Commutated (EC) fans to include spark-proof IP68-ATEX-rated versions for applications involving explosive atmospheres or flammable gases. Implementing IP68-ATEX fans into a design decreases the possibility of an explosion or fire. Available in a range of sizes including 60 mm, 120 mm, and 172 mm, the EC IP68-ATEX fans are ideal for a broad range of applications including appliances, commercial and process control, refrigeration, HVAC, electronic enclosures, and cabinets. By maintaining the same interface between the fan and equipment, EC fans can be used as drop-in replacements for equivalent-sized AC fans. The AC input fans utilize a brushless DC motor and incorporate voltage transformation within the motor for significantly lower power consumption. This equates to power savings of up to 50 percent.
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Cable assemblies for demanding microwave and RF applications

Intelliconnect has expanded its cable assembly offering for high-frequency and mission-critical applications. Comprised of high-quality cables, connectors, and terminations, the highly reliable RF cable assembly product offering now includes Low Loss, Semi-Rigid, Semi-Flex, and Conformable versions. The microwave and RF cable assembly line is designed for a wide range of applications including marine, medical, mil/aero, microwave communications, oil and gas, rail traction, test and measurement, and more. Available in a variety of sizes and performance specs, these assemblies operate up to 70 GHz and beyond and can be armored internally or externally. Phase matching is also available. Assemblies can be specified as matched sets or built to a specified phase length.
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How electronic flow sensors help spread road salt

Salt spreading trucks use a pre-wetting system when ice needs to be removed from roads and the temperatures are too low for direct salt spreading to work. The system sprays salt water onto the road salt as it is being spread to "jump start" the melting process. But how do you monitor the amount of pre-wet salt used?
Read this short, informative blog from Gems Sensors & Controls.


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!
Learn more about this new and exciting lighting technology.


Slip rings improve Ethernet transmission

The Kuebler Group offers contact and contactless slip rings for reliable Ethernet transmission, achieving higher data rates and greater cycle synchronicity in demanding industrial environments. Application examples include industrial automation, bottling plants, labeling machines, rotary tables, and other processes requiring high transmission rates. The standard Slip Ring SR120 features an innovative three-chamber system and shield to enable parallel, interference-free Ethernet transmission up to 100 Mbps. It boasts a long service life up to 500 million revolutions and a rugged, modular structure that can be expanded up to 20 channels. Another model, the Slip Ring SR160 with integrated Sendix Encoder, provides position information in addition to contactless Ethernet transmission -- either two channels at 100 Mbps multiplexed or one channel at 1 Gbps.
Learn more.


Diamond and graphene combo demonstrate superlubricity in the lab

Scientists at the U.S. Department of Energy's Argonne National Laboratory have found a way to use tiny diamonds and graphene to give friction the slip, creating a new material combination that demonstrates the rare phenomenon of "superlubricity."

Led by nanoscientist Ani Sumant of Argonne's Center for Nanoscale Materials (CNM) and Argonne Distinguished Fellow Ali Erdemir of Argonne's Energy Systems Division, the five-person Argonne team combined diamond nanoparticles, small patches of graphene (a two-dimensional single-sheet form of pure carbon) and a diamond-like carbon material to create superlubricity, a highly desirable property in which friction drops to near zero.

According to Erdemir, as the graphene patches and diamond particles rub up against a large diamond-like carbon surface, the graphene rolls itself around the diamond particle, creating something that looks like a ball bearing on the nanoscopic level. "The interaction between the graphene and the diamond-like carbon is essential for creating the 'superlubricity' effect," he said. "The two materials depend on each other."

At the atomic level, friction occurs when atoms in materials that slide against each other become "locked in state," which requires additional energy to overcome. "You can think of it as like trying to slide two egg cartons against each other bottom-to-bottom," said Diana Berman, a postdoctoral researcher at the CNM and an author of the study. "There are times at which the positioning of the gaps between the eggs -- or in our case, the atoms -- causes an entanglement between the materials that prevents easy sliding."

By creating the graphene-encapsulated diamond ball bearings, or "scrolls," the team found a way to translate the nanoscale superlubricity into a macroscale phenomenon. Because the scrolls change their orientation during the sliding process, enough diamond particles and graphene patches prevent the two surfaces from becoming locked in state. The team used large-scale atomistic computations on the Mira supercomputer at the Argonne Leadership Computing Facility to prove that the effect could be seen not merely at the nanoscale but also at the macroscale.

"A scroll can be manipulated and rotated much more easily than a simple sheet of graphene or graphite," Berman said.

The catch
However, the team was puzzled that while superlubricity was maintained in dry conditions, in a humid environment this was not the case. Because this behavior was counterintuitive, the team again turned to atomistic calculations. "We observed that the scroll formation was inhibited in the presence of a water layer, therefore causing higher friction," explained co-author Argonne computational nanoscientist Subramanian Sankaranarayanan.

While the field of tribology has long been concerned with ways to reduce friction -- and thus the energy demands of different mechanical systems -- superlubricity has been treated as a tough proposition. "Everyone would dream of being able to achieve superlubricity in a wide range of mechanical systems, but it's a very difficult goal to achieve," said Sanket Deshmukh, another CNM postdoctoral researcher on the study.

"The knowledge gained from this study," Sumant added, "will be crucial in finding ways to reduce friction in everything from engines or turbines to computer hard disks and microelectromechanical systems."

A paper based on the study, "Macroscale superlubricity enabled by graphene nanoscroll formation," appeared in the May 14 online issue of Science Express. The work was funded by the DOE's Office of Science. The Center for Nanoscale Materials and the Argonne Leadership Computing Facility are DOE Office of Science User Facilities.

Source: DOE/Argonne National Laboratory

Published July 2015

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