
The Finger Heartbeat Detection Sensor Module is a compact biosensing module designed to measure heartbeats by detecting changes in blood volume within a finger using an infrared LED and photodetector. Based on the principle of photoplethysmography (PPG), the sensor monitors variations in blood flow caused by heart contractions and generates corresponding pulse signals.
The module features onboard signal conditioning circuitry and provides both analog and digital outputs, making it easy to interface with Arduino, ESP32, STM32, Raspberry Pi Pico, and other microcontroller platforms. An onboard LED indicator flashes in sync with detected heartbeats, providing visual feedback during operation.
This sensor is widely used in health monitoring projects, fitness devices, biomedical experiments, wearable electronics, and educational electronics applications.