KY-039 Heartbeat Pulse Sensor Module – Finger Heart Rate Detection

KY-039 heartbeat sensor module designed to detect pulse rate by measuring changes in blood flow using an infrared LED and phototransistor.
When a finger is placed over the sensor, it detects variations in light caused by blood flow, allowing heart rate monitoring.
Provides analog output that can be read by Arduino, ESP32, and other microcontrollers for processing and display.
Compact and easy to use, making it ideal for basic health monitoring projects, STEM learning, and DIY bio-sensing applications.