A Photoplethysmograph Experiment for Microcontroller Labs

An easy-to-build photoplethysmograph experiment for microcontroller labs is presented. Students learn about direct sensor interfacing to modern mixed-signal microcontrollers and signal processing during an exciting biomedical measurement which is general and important enough to be included in various engineering courses. The full development is open source and the low-cost hardware is available worldwide. The experiment is highly transparent and scalable, and accessible to beginners while providing many challenges to even the most qualified students. It can also be used as a demonstration tool in oral lecturing.

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