KY-039, Finger Heartbeat Sensor, 3.3V to 5V

The KY-039 Heartbeat Sensor is a compact and easy-to-use module designed to detect heartbeats using infrared light. It features an onboard IR LED and photosensitive diode that measure changes in light intensity caused by blood flow in the finger, allowing for accurate heartbeat detection. The module provides an analog voltage output corresponding to the signal strength, making it suitable for health monitoring and biometric projects.

Key Features:

• Infrared-Based Detection: IR LED and photosensitive diode detect heartbeat-induced changes in blood vessel dilation.
• Analog Voltage Output: Provides an analog signal proportional to the detected infrared light intensity.
• Compact Design: Dimensions of 19 x 15mm [0.73 x 0.6in] for easy integration into various projects.
• Wide Operating Voltage: Compatible with 3.3V to 5V DC power supplies.
• Broad Temperature Range: Operates reliably from -40°C to 85°C.