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This is a demonstration of my students Master Thesis project.
The system Is powered via NFC interface. The developed power management system collects electrical energy until the storage capacitor is fully charged. When it reaches a certain threshold, an ECG measurement is started for the next 3.5 seconds. The measured signal gets analyzed in real time with R wave detection and the result gets transmitted to the computer via NFC.
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An analog Pan Tompkins Detector is implemented with low power optimized OPAs. A microcontroller detects the R wave peaks and measures the intervals which are transmitted via a separately powered Bluetooth low energy interface to a mobile device or PC.
Here is the website of my institute: