August 07, 2018 Volume 14 Issue 29

Electrical/Electronic News & Products

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LED headlights installed on San Francisco's historic cable cars

Since 1873, the best lighting the historic San Francisco Municipal Cable Cars had was dim incandescent headlights that did not do anything for illumination. They were merely bright enough to serve as an indicator that a cable car was coming. After over 140 years, that finally changed with their upgrade to LED light bulbs from LEDtronics. Along with the PAR46 LED headlights, A19-style LED light bulbs were also installed inside the passenger cabins. Savings on energy costs and maintenance are major benefits.
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Verify color accuracy in real time

The LEX-1000 sensor from EMX Industries is used to measure the relative color characteristics for a wide variety of light sources and illuminated objects. It focuses the light onto a sensitive RGB photodiode, where it is measured for its red, green, and blue (RGB) composition. When all three colors fall within the programmed tolerance, the output indicates a match. This is a great solution for evaluation of all visible light sources, LCD and LED display quality, and automotive lighting verification.
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Solenoid valves for commercial space vehicles

Marotta Controls has launched CoRe Flow Controls, a new series of commercially available, high-performance solenoid valves for today’s NewSpace generation of reusable launch vehicles. It enables system designers to quickly move through the development phase with minimal risk, and its versatility allows for integration into a wide variety of critical applications, including pressurization systems, stage separation, and engine controls. The line consists of six flight-qualified solenoid valves designed around common components with operating pressures up to 6,000 psi (41 MPa). This standardized, high-volume production approach enables Marotta to offer lower cost components with shorter lead times.
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Waterproof 6-axis acceleration and angular rate sensor

Code Mercenaries has released the JoyWarrior 56FR1-WP, a cost-efficient, waterproof, six-axis MEMS motion sensor that provides 3-axis measurements of both acceleration and angular rate with 16-bit resolution for motion, vibration, or orientation sensing applications. Readings are taken at 833 measurements per sec in standard mode, while a high-speed mode generates 6,664 data points per sec. The different range settings at which acceleration and angular rate can be measured can be stored permanently in the sensor. Comes with a 6-ft cable and USB interface. Available from U.S. distributor Saelig.
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Advancements in reed switch-based technology for liquid-level sensing

Madison Company has developed an advancement in proven reed switch-based technology that provides ultra-high resolution, very tight tolerances, and consistent repeatable measurements in liquid level sensor designs. Sensors can be also designed to withstand extreme shock or vibration as well as corrosive conditions and temperature variations. Applications include: power generators, commercial compressors, power transmission equipment, chemical processing, and hydraulic systems.
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New touchless angle sensors with CANBus interface

Novotechnik, U.S. introduces the RFC4800 Series of touchless angle sensors measuring angular position up to 360°, revolution counter, and speed -- with J1939 CANBus interface in addition to CANopen. Features include programmable zero-point offset, measurement averaging, and sign of rotational direction. RFC4800 Series has a resolution of 14-bits across 360°, repeatability of 0.36°, and independent linearity of +/-0.5% of full scale. J1939 CANBus provides a different feature set than CANopen. It has peer-to-peer or broadcast signaling and fixed messages rather than configurable. There are other differences too.
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Inline Code Matcher makes for reliable packaging

The Inline Code Matcher is a stand-alone quality-control system featuring SICK Lector 6xx image-based code readers that reliably read 1D and 2D codes on packages to match packaging with the correct products. The Inline Code Matcher system software uses a 7-in. touch screen with an intuitive user interface for operation and to visualize data. The Inline Code Matcher’s modular design and auto set-up feature allow for easy integration into existing plants. Products can be changed over during a live operation on the basis of an example product or manually with a hand-held scanner.
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Minimizing noise in electric linear motion systems

Under most circumstances, electric linear motion systems are quiet. They certainly don’t create the hissing and bang-bang noises associated with pneumatic systems. However, there’s another type of noise that comes with electric systems of all types: electrical noise or interference. The results can be anything from erratic movements to complete system failure. Patrick Hobart from Tolomatic runs through best practices for minimizing noise in these automation systems.
Read this insightful blog.


Sony releasing 0.5-type OLED microdisplay with top-of-class UXGA resolution

Sony Corporation recently announced the upcoming release of the ECX339A OLED Microdisplay featuring UXGA (1,600 x 1,200 resolution), the highest in class for a 0.5-type. This product achieves the world's smallest pixel pitch of 6.3μm by leveraging Sony's OLED display technology and miniaturization technology, enabling a resolution 1.6x higher than the previous model. By employing a new drive circuit design that operates on half the voltage of the previous model, the new product achieves the same level of low-power operation as its predecessor but with much higher resolution.
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Want to make your factory wireless? NIST how-to guide

The National Institute of Standards and Technology (NIST) has published the first-ever set of science-based guidelines to help users select the best wireless system for any specific industrial environment, custom-design the setup to make it work, successfully deploy it, and then ensure that the network performs as needed. The publication is called, "Guide to Industrial Wireless Systems Deployments." By eliminating physical connections such as wires and cables from a facility's communication network, wireless technology offers many manufacturing, chemical processing, and utility organizations a means to run their entire operation more efficiently, more productively, and at less cost.
Get the guide. No registration required.


Mike Likes: Fixed-mount infrared cameras help you analyze the heat

For precise research, science, and engineering applications, just seeing heat is not enough -- it needs to be measured and analyzed as well. The new Fluke RSE300 and RSE600 Infrared Cameras are the first fully radiometric, fixed-mount cameras from Fluke with advanced features including MATLAB and LabVIEW software plug-ins to easily analyze thermal data. These cameras continuously stream up to 60 frames of data per sec, allowing for detailed monitoring of temperature patterns and variances. With the included SmartView desktop software, users can remotely focus the camera, auto-capture images, adjust level and span, and analyze infrared videos frame by frame. The software also makes it easy to edit images, generate customized reports, and export images to multiple formats to share thermal data quickly.
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LED controller for automotive lighting designs

Texas Instruments (TI) has introduced the first 3-channel high-side linear automotive light-emitting diode (LED) controller without internal MOSFETs, which gives designers greater flexibility for their lighting designs. The TPS92830-Q1's novel architecture enables higher power and better thermal dissipation than conventional LED controllers, and is particularly beneficial for automotive LED lighting applications that require high performance and reliability. The LED controller's flexible on-board features give designers the freedom to select the best MOSFET for their system requirements. With this new approach, designers can optimize their lighting power designs more quickly and efficiently for automotive system requirements and desired dimming features.
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New ultra high-brightness LCDs for outdoor viewing

The Tianma Group has introduced two new LCDs: a 10.1-in. WXGA and 15.6-in. WXGA, both with ultra-high luminance. These modules are ideal for industrial applications needing superior viewing in outdoor or other high ambient light environments such as ATMs and payment terminals. The 10.1-in.-wide model has a luminance of 1000 cd/m2, and the 15.6-in.-wide model has a luminance of 1250 cd/m2. The ultra-high luminance of these models results in displays with vivid colors and excellent visibility, even in direct sunlight, and further expand Tianma’s extensive offering of industrial products.
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Mouser Electronics New Product Insider

Mouser Electronics specializes in the rapid introduction of new products and technologies. As the industry leader in New Product Introductions (NPIs), Mouser makes it a priority to stock the newest products and technologies from their 700+ manufacturer partners, giving customers an edge and helping speed time to market. In 2017, Mouser launched a total of 2,326 new products. Last month, Mouser launched more than 270 new products ready for same-day shipment. Latest products include: Linear Technology/Analog Devices DC1962C-KIT Starter Kit step-down DC/DC controller; TE Connectivity AmbiMate Sensor Module MS4 Series that provides motion, light, temperature, and humidity sensors plus optional sound; andON Semiconductor RSL10 Multi-Protocol Bluetooth 5 System-on-Chip.
See the latest from Mouser Electronics.


LED panel-mount indicators are all about flexibility

Visual Communica-tions Company’s (VCC) 90 Series panel-mount indicators are designed for an extended life and quick installation, and they are unique because they deliver enhanced design flexibility through three termination styles: cartridge, bi-pin, and wire leads. They save time during installation and maintenance and require less-frequent replacement. The P80 Series LED panel mount indicator is designed to streamline installation with a snap-in mounting design that requires no additional hardware. It is offered in six single LED colors (red, orange, amber, green, blue, and clear). Five lens colors are also available: red, amber, green, blue, and clear.
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Quantum dot white LEDs achieve record efficiency

Researchers created nanomaterial-based white LEDs that exhibit a record high efficiency thanks to quantum dots that are suspended in solution rather than embedded in a solid. [Credit: Sedat Nizamoglu, Koç University]

 

 

 

 

Researchers have demonstrated nanomaterial-based white-light-emitting diodes (LEDs) that exhibit a record luminous efficiency of 105 lumens per watt. Luminous efficiency is a measure of how well a light source uses power to generate light. With further development, the new LEDs could reach efficiencies over 200 lumens per watt, making them a promising energy-efficient lighting source for homes, offices, and televisions.

"Efficient LEDs have strong potential for saving energy and protecting the environment," said research leader Sedat Nizamoglu, Koç University, Turkey. "Replacing conventional lighting sources with LEDs with an efficiency of 200 lumens per watt would decrease the global electricity consumed for lighting by more than half. That reduction is equal to the electricity created by 230 typical 500-megawatt coal plants and would reduce greenhouse gas emissions by 200 million tons."

The researchers describe how they created the high-efficiency white LEDs in Optica, The Optical Society's journal for high-impact research. The new LEDs use commercially available blue LEDs combined with flexible lenses filled with a solution of nano-sized semiconductor particles called quantum dots. Light from the blue LED causes the quantum dots to emit green and red, which combines with the blue emission to create white light.

"Our new LEDs reached a higher efficiency level than other quantum dot-based white LEDs," said Nizamoglu. "The synthesis and fabrication methods for making the quantum dots and the new LEDs are easy, inexpensive, and applicable for mass production."

Advantages of quantum dots
To create white light with today's LEDs, blue and yellow light are combined by adding a yellowish phosphor-based coating to blue LEDs. Because phosphors have a broad emission range, from blue to red, it is difficult to sensitively tune the properties of the generated white light.

Unlike phosphors, quantum dots generate pure colors because they emit only in a narrow portion of the spectrum. This narrow emission makes it possible to create high-quality white light with precise color temperatures and optical properties by combining quantum dots that generate different colors with a blue LED. Quantum dots also bring the advantage of being easy to make, and the color of their emission can be easily changed by increasing the size of the semiconductor particle. Moreover, quantum dots can be advantageously used to generate warm white light sources like incandescent light bulbs or cool white sources like typical fluorescent lamps by changing the concentration of incorporated quantum dots.

Although quantum dots embedded in a film are currently used in LED televisions, this lighting approach is not suitable for widespread use in general lighting applications. Transferring the quantum dots in a liquid allowed the researchers to overcome the problematic drop in efficiency that occurs when nanomaterials are embedded into solid polymers.

Making efficient white LEDs requires quantum dots that efficiently convert blue light to red or green. The researchers carried out more than 300 synthesis reactions to identify the best conditions, such as temperature and time of the reaction, for making quantum dots that emit at different colors while exhibiting optimal efficiency.

"Creating white light requires integrating the appropriate amount of quantum dots, and even if that is accomplished, there are an infinite number of blue, green, and red combinations that can lead to white," said Nizamoglu. "We developed a simulation based on a theoretical approach we recently reported and used it to determine the appropriate amounts and best combinations of quantum dot colors for efficient white-light generation."

To make the new LEDs, the researchers filled the space between a polymer lens and LED chip with a solution of quantum dots that were synthesized by mixing cadmium, selenium, zinc, and sulfur at high temperatures. The researchers used a type of silicone to make the lens because its elasticity allowed them to inject solutions into the lens without any solution leaking out, and the material's transparency enabled the necessary light transmission.

The researchers showed that their liquid-based white LEDs could achieve an efficiency double that of LEDs that incorporate quantum dots in solid films. They also demonstrated their white LEDs by using them to illuminate a 7-in. display.

"Quantum dots hold great promise for efficient lighting applications," said Nizamoglu. "There is still significant room for technology development that would generate more efficient approaches to lighting."

As a next step, the researchers are working to increase the efficiency of the LEDs and want to reach high efficiency levels using environmentally friendly materials that are cadmium- and lead-free. They also plan to study the liquid LEDs under different conditions to ensure they are stable for long-term application.

Source: Optica

Published August 2018

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