The Heart Rate Pulse Sensor Module for Arduino is a plug-and-play, biometrics-powered sensor designed for makers, students, developers, and hobbyists who want to easily incorporate live heart rate data into their projects. Whether you are building a wearable health device, an interactive art installation, or a fitness tracking prototype, this compact optical sensor provides a streamlined solution for capturing real-time pulse waveforms.Operating on a simple photoplethysmography (PPG) principle, the module utilizes an integrated light source and photodetector to measure the subtle changes in capillary blood volume through the skin. By placing a fingertip or earlobe over the sensor, it instantly outputs an analog signal that can be read and processed by any standard microcontroller.Its exceptionally small form factor and low power consumption make it ideal for mobile and battery-operated applications. The module bridges the gap between complex biomedical engineering and accessible DIY electronics, allowing creators of all skill levels to experiment with biometric data visualization. It is an excellent educational tool for STEM classrooms, electronics labs, and rapid prototyping environments where user interaction is a core feature.4. Key FeaturesPlug-and-Play Integration: Easily connects to microcontrollers without the need for complex external circuitry.Real-Time Data Tracking: Provides instant analog voltage feedback to map live heart rate waveforms.Optical Sensing Technology: Utilizes high-sensitivity photodetectors for non-invasive pulse monitoring.Ultra-Compact Design: Small, lightweight circular PCB footprint effortlessly fits into wearables and tight enclosures.Low Power Consumption: Optimized for energy efficiency, making it perfect for battery-powered projects.Versatile Placement: Can be comfortably clipped or taped to a fingertip, earlobe, or other areas with accessible capillary blood flow.Broad Microcontroller Support: Universally compatible with popular open-source development boards and microcontrollers.Ideal for STEM & Making: A fantastic hands-on tool for teaching biology, programming, and electronics integration.5. Technical SpecificationsSpecificationDetailProduct NameHeart Rate Sensor Module for ArduinoModelPulseSensor StandardPart NumberNot officially specifiedDimensionsApprox. 16mm Diameter (0.625 inches)WeightNot officially specifiedVoltage$3\text{V}$ to $5\text{V}$CurrentApprox. $4\text{mA}$ at $5\text{V}$MaterialFiberglass PCB with protective coatingColorBlack / Multi-color wiresCompatibilityArduino, Raspberry Pi, ESP32, and general analog microcontrollersPackage Contents1 x Pulse Sensor Module, 3 x Attached Jumper Cables