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.
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