2/5/10PCS KY-039 5V Finger Measuring Heartbeat Sensor Senser Detector Module
ab 1,15 €
This project uses bright infrared (IR) LED and a phototransistor to detect the pulse of the finger, a red LED flashes with each pulse.Pulse monitor works as follows when the blood pressure pulse by the finger when the resistance of the phototransistor will be slight changed.
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