KY-039 Finger Detection Heartbeat Measuring Sensor Module utilizes a bright infrared (IR) LED and a phototransistor to detect the pulse of the finger, indicated by a flashing red LED with each heartbeat.
The IR LED emits light on one side of the finger, while the phototransistor detects the light flux on the opposite side. When the finger experiences a blood pressure pulse, the resistance of the phototransistor undergoes slight changes.
Packing Lis
1 x KY-039 Finger Detection Heartbeat Sensor
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