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23June
2016
This is for experienced designers and will allow them to work with the ARM Cortex-M microcontrollers (MCUs) down to register-level code, to controlling device peripheral and to optimise performance and run-time efficiency. The LL APIs are integrated into the STM32Cube packages with example projects designed to run on STM32 Nucleo development boards. The LL APIs can be used in parallel with the corresponding hardware abstraction layers (HALs) in the same project, making it possible to trade-off between project time and performance parameters such as software footprint, and run-time efficiency. Like the HALs in each STM32Cube embedded software package, the LL APIs are MISRA-C 2004 compliant with a few exceptions that are fully listed and explained… Read Full Article at Electronics Weekly
23June
2016
u-blox of Switzerland has introduced a GPS receiver that works with inertial sensors to add dead-reckoning navigation when satellites signals are weak or before the receiver has locked-on. It requires an external MEMS inertial sensor and flash memory, and also works with other satellite navigation (GNSS) systems (list below).“EVA-M8E adapts automatically to installations anywhere within a vehicle. Dead-reckoning with adaptive signal strength compensation helps reduce the effects of small antenna and poor installations. This makes EVA-M8E ideal for extremely small after-market road-vehicle applications such as usage-based insurance and theft alarms.” Power consumption is 29mA at 3V (plus a 1.4-3.6V back-up supply), which the firm feels is low enough to allow ‘untethered’ operation – operation without connection to the vehicle electrical supply. The external inertial system needs to include 3D accelerometers and 3D gyros. While a list of recommended MEMS sensors, or an appropriate specification, remains illusive, the firm’s C93-M8E dashboard-top GNSS+dead reckoning reference design (pictured) appears to use a Bosch Sensortec BMI160. Applications are expected in self-contained car trackers – to be used in conjunction with insurance policies, for example… Read the full article at Electronics Weekly
23June
2016
Researchers from KU Leuven (Belgium), the University of Strasbourg, and CNRS have discovered a new phosphor that could make next-generation fluorescent and LED lighting even cheaper and more efficient. The team used highly luminescent clusters of silver atoms and the porous framework of minerals known as zeolites. Silver clusters consist of just a few silver atoms and have remarkable optical properties. However, current applications are limited, because the clusters tend to aggregate into larger particles, thus losing the interesting optical properties. Professor Hofkens and his team from the Molecular Imaging and Photonics Unit have now found a way to keep the silver clusters apart by inserting them into the porous framework of zeolites. The result: stable silver clusters that maintain their unique optical properties. Zeolites are minerals that are either found in nature or produced synthetically on an industrial scale. The minerals have a very rigid and well-defined framework of small molecular-sized channels, pores, and cages. They’re commonly used in domestic and industrial applications such as washing detergent and water treatment. Professor Maarten Roeffaers from the Centre for Surface Chemistry and Catalysis explains: “Zeolites contain sodium or potassium ions. We used ion exchange to replace these ions with silver ions. […]