Description IR Pulse Sensor Module – Heart Rate Detection The IR Pulse Sensor Module is a compact and efficient tool for monitoring heart rate. It uses an infrared (IR) LED and a phototransistor to detect the pulse through the finger, with a red LED indicator flashing in sync with each heartbeat. This module is ideal for DIY projects, learning electronics, and integrating health monitoring into various systems. Key Features Infrared-Based Pulse Detection: Utilizes a bright IR LED and a phototransistor to measure pulse through light intensity variations in the finger. Visual Feedback: A red LED flashes in sync with each detected heartbeat, providing real-time visual feedback. High Sensitivity: The design includes a high-resistance resistor (R1) to ensure the phototransistor can detect even minimal light variations caused by blood flow. Noise Reduction: Shielding minimizes stray light interference, especially from ambient 50Hz or 60Hz lighting, for accurate readings. Compact Design: Easy to integrate into wearables or standalone health monitoring devices. How It Works Light Transmission: The IR LED emits light through the finger. Pulse Detection: The phototransistor on the opposite side detects changes in light intensity caused by blood flow during each heartbeat. Signal Processing: The resistance of the phototransistor changes slightly with each pulse, and this change is converted into a flashing red LED signal. Stray Light Shielding: The module is designed to block stray light, especially from home lighting, to improve accuracy. Applications DIY Health Monitoring Projects: Build your own heart rate monitor. Wearable Devices: Integrate into fitness bands or smartwatches. Educational Use: Learn about phototransistors, IR LEDs, and signal processing. Tips for Best Results Adjust Resistance: Fine-tune the value of resistor R1 through experimentation to achieve optimal sensitivity. Minimize Stray Light: Ensure the phototransistor is shielded from ambient light to reduce noise interference. Proper Placement: Align the IR LED and phototransistor accurately for effective pulse detection. Package Includes: 1 x Finger Measuring Heartbeat Sensor Module This module is designed for detecting heart rate by measuring pulse through a finger, ideal for DIY health projects or learning about sensor technology.
