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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
Heart Rate Pulse Sensor Module FTDI 232 Mini USB to TTL Converter Compact & Lightweight: Easy to Compact & Lightweight: Easy to carry in a tool belt or pouch NC) enables both normally open and normally closed switching logic in a single relay Real Time Analog Output: Delivers a continuous waveform that can be sampled at 500 Hz or higher for advanced heart rate variability (HRV) analysis and R peak detection Optical PPG Sensing: A bright green LED illuminates capillary blood flow while a matched photodetector picks up volumetric changes with each heartbeat
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