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Maxim hSensor platform for development of wearable electronic devices

05.11.2016

Focusing on the needs of developers of wearable electronic devices for monitoring indicators of physical activity of the user, Maxim Integrated Products introduced the hSensor platform.

The miniature hSensor board contains the MAX30003 single-channel analog interface for digitizing biopotentials, the MAX30101 heart rate and blood oxygen saturation sensor, the MAX30205 temperature sensor, the MAX32620 low-power microcontroller based on the ARM Cortex-M4F core, and the MAX14720 power controller. In addition, hSensor equipment includes inertial sensors, a barometric sensor, flash memory and a Bluetooth LE interface. In addition to the prototype board, the platform includes a development board, drivers, a graphical user interface, and firmware available in source code.

The hSensor platform is suitable for building wearable vital signs monitors, smart scales, biometric authentication tools and other similar devices, Maxim says. Starting a design with hSensor can save three to six months, the manufacturer estimates, as it eliminates the development phase of prototype hardware and firmware.

The price of MAXREFDES100# is $150.

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Silica gel is the most common chemical agent for providing a dry space in many things, especially in shoes, where it is placed in a special niche under the sole - which helps to prevent the accumulation of excessive amounts of moisture and the growth of fungi. However, microbiologists from the Australian University of New South Wales today presented the results of their work on the properties of graphene oxide as such a chemical agent - based on such a well-known material as graphene, this variety of it really has impressive capabilities.

Specialists have long observed the action of graphene oxide - consisting of hydrogen, carbon and oxygen atoms - in the context of its interaction with other chemical agents and direct moisture on various surfaces. They created a special multilayer graphene structure, where each layer serves as a certain insulator of absorbed moisture, which makes it possible to absorb it noticeably faster and more efficiently, unlike traditional agents of this type.

In particular, the scientists found that their new graphene structure has the ability to absorb up to 0,58 g of water per 1 g of graphene oxide, which is a really promising result. What's more, they found that each layer is particularly easy to control when exposed to certain light and laser patterns - and this could lead to the development of new graphene systems.

The scientists point out that in the course of studying the properties of graphene, they found that by changing the scale of the space between each individual layer of the structure, they can achieve ultra-precise tuning of the speed and frequency at which graphene oxide absorbs water. This last aspect will definitely come in handy in creating new technological systems for using graphene as a drying chemical agent, especially since from an economic point of view, its use is quite justified and more rational than silicon.

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