Design, Development and Test of Electronic Interface for Photoplethysmography Devices

PhotoPlethysmoGraph is an instrument for measuring volumetric changes in blood in peripheral circulation due to heart activity. Wearable heart rate sensors that rely on PPG are becoming more popular, but, usually, manufacturers do not disclose specifications or allow access to raw data. This work aims to design, develop, and test an electronic interface for PPG devices suitable for specific applications where it's crucial to control all the parameters and where quality and integrity of measurements are unquestionable. The characterization of the realized analog front-end and the evaluation of the effectiveness of the device are shown.