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EETE MAR 2017

DESIGN & PRODUCTS MISCELLANEOUS Heart rate optical sensor slashes power consumption Optimized for wearable devices, the BH1790GLC heart rate optical sensor from Rohm leverages proprietary analogue circuit technology and optical sensor expertise to improve sensitivity, allowing pulse waves to be detected with high accuracy, even with low LED brightness. A specialized optical filter enables high accuracy detection, extending battery life while reducing the effects of IR rays ten folds versus conventional products. This makes it possible to acquire high quality pulse signals even in environments with strong IR presence, such as outdoors, or under intense movements. Thanks to this optimization, the 2.8x2.8x0.9mm device is claimed to reduce power consumption by approximately 74%, contributing to longer battery life in wearable devices. The BH1790GLC is capable of detecting high quality pulse signals using low VF low brightness LED elements, eliminating the need for DC/ DC circuits for LED power supply conventionally required. This decreases mounting area by 30%, lightening development load, says Rohm. The company also provides an optical heart rate monitor expansion board (BH1790GLC-EVK-001) that can collect and process sensor information. Rohm www.rohm.com All-inclusive e-paper evaluation pack This month, e-paper display maker Pervasive Displays is giving away ten evaluation packs worth $141 each, for EETimes Europe’s readers to understand how e-paper Reader O f f er works and explore its features like global updates and fast partial updates. Each pack comes with the company’s EPD Extension Kit Gen 2 (EXT2) with its powerful PDi Apps utility, Texas Instrument’s ARM Cortex-M4F based TM4C123G LaunchPad evaluation kit onto which the EXT2 board can be directly stacked to run various applications, and several of PDi’s e-paper labelling displays including the 2.71” eTC (264x176 pixels at 117dpi), the 2.87” iTC (296x128 pixels at 112dpi) and the 4.2” iTC (400x300 pixels at 120dpi). Designers can also use the on-board headers of the EXT2 to bridge with a current product design or any other development kit. Additionally, the EXT2 provides on-board driver circuits to support applications with EPDs that use external or internal timing controllers (such as the eTC or iTCs that are provided in the pack) and builds with different material films. Pervasive Displays www.pervasivedisplays.com Check the reade r offer online at www.electronics-eetimes.com MEMS accelerometer for wake-up, context sensing in IoT, wearables STMicroelectronics NV (Geneva, Switzerland) has developed a tri-axis MEMS accelerometer that is intended for wake-up and context sensing in Internet-of-Things (IoT) and wearable devices. The LIS2DW12 has a 16-bit output and can be set to prioritize low power consumption or low-noise performance, with five settings in either mode. It can avoid waking the system to check for data and allows single-byte transfers. The unit draws a current as little as 50nA in standby and 380nA in low-power mode at a data output rate of 1.6Hz. The supply voltage range goes from 3.6V down to 1.62V. Features that support system-level power savings include a 32-level FIFO, a built-in temperature sensor, and a programmable interrupt for freefall, wake up, activity/inactivity, 6D/4D orientation detection, and tap/double-tap detection. The package measures 2mm by 2mm by 0.7mm. Engineering samples of the LIS2DW12 are available with volume production due to begin in 1Q17. STMicroelectronics NV www.st.com Machine vision cameras are freely programmable EVT unveiled three ZYNQ platforms for its EyeVision machine vision software. The ZYNQ cameras provide software users with a hardware platform for every application of the software. The systems are based on a DualCore ARM with FPGA so that even challenging image evaluation in real time can be solved by programming the FPGA. The tiniest member of the ZYNQ family is hardly bigger than a finger, in a housing measuring only 20x20x50mm. The EyeCheck ZQ smart camera can also be used for applications where there is not much space for the camera. The S-Mount adapter and the integrated illumination, allows the user to realize even challenging image evaluation. The EyeCheck ZQ has 10 freely programmable IOs and interfaces such as Ethernet, RS485 and CAN. In cases where the space is not limited, a bigger ZYNQ smart camera can be used, such as a camera of the EyeCheck 4xxx, or EyeCheck 9xxx series. With a C-Mount lens adapter and more I/O interfaces the cameras are suitable for almost all applications. For OEM clients, EVT offers also a compact board series, which can be directly integrated into the machine. EVT Eye Vision Technology GmbH www.evt-web.com 46 Electronic Engineering Times Europe March 2017 www.electronics-eetimes.com


EETE MAR 2017
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