MAX30102 Pulse Oximeter Heart Rate Sensor Module

The MAX30102 Pulse Oximeter Heart Rate Sensor Module is a compact optical sensing solution for measuring pulse-related signals and developing heart-rate and SpO2 monitoring projects. It combines red and infrared LEDs, a photodetector, ambient-light rejection and low-noise signal-processing circuitry in a small sensor package.

The module communicates with a microcontroller through an I2C-compatible interface, making it suitable for Arduino, ESP32 and other embedded development projects when the required logic-level interfacing is provided.

The sensor uses changes in reflected red and infrared light to detect variations caused by pulsating blood flow. Its programmable LED current and sample settings help developers balance measurement performance and power consumption, while the FIFO data buffer supports efficient data collection. The integrated ambient-light cancellation and high signal-to-noise performance can help improve readings in practical wearable and fitness applications.

The MAX30102 is well suited for DIY electronics, wearable prototypes, fitness-monitoring projects, biometric experiments and educational embedded-system projects. It is a sensor component for development and prototyping, not a medical diagnostic device.

read our blogon eye blinking sensor, which provides information about the working principle of an eye blink sensing system.

Note: For this sensor, you have to pull up SCL & SDA Pin( You have to connect a 10Kohm resistor between SCL & 5V And Same as SDA to 5V)

Features:

• Integrated red and infrared optical sensing for pulse and SpO2-related projects
• I2C-compatible digital interface for easy microcontroller communication
• Integrated LEDs, photodetector and ambient-light cancellation
• Programmable LED current and sampling parameters for power-conscious designs
• High signal-to-noise performance for more robust optical measurements
• Compact sensor solution for wearable, fitness and embedded prototypes
• Compatible with popular Arduino and other microcontroller development workflows with suitable voltage-level interfacing

Applications:

• Fitness Assistant Devices
• Medical Monitoring Devices
• Wearable Devices

Arduino Nano-Based Pulse Oximeter with OLED Display Wiring Diagram: