Very simple ECG + Pulse Oximeter using arduino

Scott W Harden has built an updated version of his ECG circuit for tracking his heartbeat. The main goal of the update is to provide a hack for collecting heartbeat with minimal h/w cost and circuit complexity. As you can see from the project photo above, the heartbeat detector is based on photoplethysmogram. Scott nicely describes the basics of heartbeat detection and also how LEDs can be us ...

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