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ppg

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Arduino Nano photoplethysmography heart rate monitor. Captures raw IR samples from a MAX30105 optical sensor over I2C at 400 kHz, runs real-time beat detection, and renders live BPM and scrolling PPG waveforms on a 1.8" ST7735 TFT via SPI. Includes 450 Hz buzzer alerts for finger-misplacement.

  • Updated May 8, 2026
  • C++

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