Adding Heart Rate Monitoring to Consumer Electronics Devices


Prototype Fitness Watch to Showcase Capability at electronica 2018

MALVERN, Pa. — The Optoelectronics group of Vishay Intertechnology, Inc. announced that it can help manufacturers add a heart rate monitoring capability to any type of consumer electronic device. Vishay will demonstrate the capability at electronica 2018 with a fitness watch prototype that uses Vishay optoelectronic components to enable the heart rate monitor function in conjunction with a software algorithm developed by Elfi-Tech Ltd., a developer of unique noninvasive medical devices.

With this capability, Vishay is creating an opportunity for companies that don't have proprietary software and hardware solutions for heart rate monitoring to add the capability to their products with a relatively low cost of entry. Together Vishay and Elfi-Tech can supply a complete reference design for the heart rate monitoring capability, including digital and analog front-end components.

Enabling Vishay optoelectronic components in the fitness watch on view at electronica 2018 include the VEMD5080X01 PIN photodiode and VLMTG1400 LED. The VEMD5080X01 is a unique surface-mount device that eliminates optical cross talk. It is sensitive to visible and infrared light from 350 nm to 1100 nm and comes in a tiny package measuring 7.5 mm by 7.5 mm by 0.9 mm. The VLMTG1400 LED has a peak wavelength in the green spectrum at 525 nm and features typical intensity of 1400 millicandela. It is packaged in a 0603 surface-mount format with a height of 0.55 mm.

Elfi-Tech provided the software and the nonoptical hardware of the fitness watch, including an Arm Cortex-M3 microcontroller, a Texas Instruments analog front-end for heart rate monitoring, Bluetooth Low Energy connectivity, and a MEMS-based accelerometer. The output is transmitted to an Android application.