uxcell KY039 5V Finger Heartbeat Sensor Sensor Detector Module for Arduino

Great Sensors for Arduino Project. Having Fun With Electronics and Programming! Description: 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: The LED is the light side of the finger, and phototransistor on the other side of the finger, phototransistor used to obtain the flux emitted, when the pressure pulse by the finger when the resistance of the phototransistor will be slight changed. Heartbeat Finger detector meets the physician, home healthcare, sports demand. Specification: PCB Size: 18.5mm x 15mm (L*W) Package Includes: 1 x Heartbeat Sensor