The KY-039 Finger Heartbeat Sensor Module is a compact pulse detection sensor designed to measure heartbeats using infrared light transmission through a fingertip. This sensor detects subtle changes in blood flow and converts them into electrical signals that can be processed by Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and other microcontroller platforms.

The module uses an infrared LED and phototransistor pair to monitor pulse variations in the finger, making it an excellent choice for health monitoring projects, biomedical experiments, wearable electronics, pulse monitoring systems, and educational electronics applications. Its simple interface and low power consumption make it ideal for students, makers, engineers, and IoT developers.

Features:

• High-quality KY-039 heartbeat sensor module

• Finger pulse detection using infrared technology

• Non-invasive heartbeat monitoring

• Detects blood flow changes through the fingertip

• Compatible with Arduino and microcontroller platforms

• Compact and lightweight design

• Low power consumption

• Fast response and stable performance

• Easy integration into DIY projects

• Suitable for health monitoring applications

• Simple analog signal output

• Ideal for wearable electronics development

• Supports real-time pulse monitoring

• Reliable pulse signal detection

BDTronics supplies quality-tested sensors, Arduino modules, and electronics components for students, engineers, makers, and automation enthusiasts. The KY-039 Finger Heartbeat Sensor Module is selected for reliable pulse detection and easy integration into health monitoring and biomedical projects.

Specifications:

• Model: KY-039

• Operating Voltage: 5V DC

• Sensor Type: Infrared Finger Heartbeat Sensor

• Output Type: Analog Signal

• Detection Method: Optical Pulse Detection

• Light Source: Infrared LED

• Interface: Analog Output

• Working Principle: Blood flow variation detection

• Power Consumption: Low

• Compatibility: Arduino, ESP32, ESP8266, Raspberry Pi, STM32, AVR, PIC

Pin Configuration:

• VCC: 5V Power Supply

• GND: Ground

• SIG: Analog Signal Output

How to Use:

• Connect VCC to 5V power supply

• Connect GND to system ground

• Connect SIG pin to an analog input pin of the microcontroller

• Place your fingertip gently over the sensor

• Avoid excessive pressure on the sensor

• Upload pulse monitoring code to the microcontroller

• Read analog signal values from the sensor

• Process the pulse waveform to calculate heart rate

• Display heartbeat data on LCD, OLED, or serial monitor

Applications:

• Heart rate monitoring projects

• Arduino biomedical projects

• Pulse detection systems

• Health monitoring devices

• Wearable electronics

• Fitness monitoring projects

• Medical prototype development

• IoT health monitoring systems

• Educational electronics experiments

• Biomedical research projects

• DIY healthcare devices

• Embedded system development

• Smart health applications

• Student science projects

• Human body monitoring systems

Advantages:

• Non-invasive measurement

• Easy microcontroller interfacing

• Compact size

• Low power consumption

• Cost-effective pulse sensing solution

• Real-time heartbeat detection

• Suitable for learning and prototyping

• Reliable infrared sensing technology

Important Notes:

• Best performance is achieved in stable lighting conditions.

• Keep the finger steady during measurement.

• This module is intended for educational, hobby, and project use.

• Not designed for medical diagnosis or clinical applications.

• Signal filtering and software processing may be required for accurate pulse rate calculations.

Package Includes:

• 1 × KY-039 Finger Heartbeat Sensor Module

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