Description
The KY-039 Heartbeat Detector Sensor Module uses an optical method to detect pulse rate by measuring changes in finger blood flow. Ideal for Arduino, Raspberry Pi, and other microcontroller projects focused on biometric sensing and health monitoring.
Compact and simple to use, it’s perfect for learning about pulse detection, wearable technology prototypes, or STEM health science projects.
- Module: KY-039
- Function: Optical pulse/heartbeat detection
- Output Type: Analog signal (0–5V)
- Operating Voltage: 3.3V – 5V
- 3-Pin Interface: VCC, GND, AO (analog output)
- Sensing Method: Infrared reflection from fingertip
- Module Size: Approx. 20mm x 15mm
Key Features:
- Module: KY-039
- Function: Detects heartbeat via IR sensor and light reflection
- Output: Analog voltage signal corresponding to pulse rate
- Voltage: 3.3V – 5V
- Interface: VCC, GND, AO
- Easy integration with Arduino and Raspberry Pi
- Compact and breadboard-friendly design
What’s Included:
- 1x KY-039 Heartbeat Detector Sensor Module
Great For:
- Pulse monitoring projects
- Health & fitness tracking prototypes
- Wearable device development
- Educational STEM/biometrics kits
- Basic biometric authentication demos
- DIY wellness electronics
Usage Tips:
- Place fingertip over the IR LED and phototransistor
- Use analogRead() on AO pin to capture fluctuating signal
- Apply signal smoothing or filtering in software for clarity
- Best used in stable, well-lit environments for accuracy
- Not intended for medical-grade use — for hobby/educational projects only
