KY-039 Heartbeat Sensor Module – Finger Pulse Detection and Monitoring IR LED Module

The KY-039 Heartbeat Sensor Module is designed for simple pulse monitoring using a fingertip and an infrared light detection system. The module consists of a bright infrared LED (IR) and a phototransistor that work together to detect changes in light intensity caused by the blood flow through the finger, enabling real-time pulse monitoring for Arduino and other microcontroller projects.

As blood flows through the finger, it alters the amount of infrared light passing through to the phototransistor. The phototransistor responds by changing its resistance, which generates an analog voltage that can be read by a microcontroller. A red LED indicator flashes with each detected heartbeat, providing a helpful visual cue.

🔧 Key Features

• Measures pulse via fingertip using IR light
• Includes IR LED and sensitive phototransistor
• Analog output signal compatible with Arduino ADC
• Flashing red LED indicates pulse detection
• High-resistance resistor for improved sensitivity
• Compact design for wearable or embedded projects

📐 Technical Specifications

📌 Applications

• Basic heart rate monitoring
• Arduino-based biomedical projects
• Wearable pulse sensing devices
• Health tracking prototypes
• Educational experiments in biosignals

💡 Why Choose This Product?

The KY-039 Heartbeat Sensor offers an affordable and easy way to detect heart rate pulses using a simple finger interface. It’s perfect for students, hobbyists, and developers creating basic biofeedback systems with Arduino or other development boards.

📦 Package Includes

• 1 × KY-039 Heartbeat Sensor Module