Monitor your heart rate easily with the KY-039 Finger Heartbeat Sensor Module, designed for Arduino beginners and makers. This non-invasive heart rate detector measures pulse signals by using an infrared LED and phototransistor to sense blood flow changes through your fingertip. Simply connect it to your Arduino UNO board using jumper wires, and visualize real-time heartbeat data through the Serial Monitor or Serial Plotter in the Arduino IDE.

Features:

• Non-invasive pulse detection – no direct skin contact required.
• Highly sensitive sensor for accurate heartbeat measurement.
• Analog signal output that can be read directly by Arduino.
• Uses infrared LED and phototransistor for precise detection.
• Simple three-pin interface: VCC (3.3V–5V), GND, and Signal (A0).
• Compact and easy to integrate into DIY health monitoring projects.

Connection Guide:

1. Connect GND to Arduino GND.
2. Connect VCC to Arduino 5V.
3. Connect Signal (S) to Arduino A0 pin.

How It Works:
When a finger is placed between the infrared LED and phototransistor, changes in blood flow during each heartbeat alter the intensity of transmitted light. The sensor converts this variation into an analog signal that represents your pulse waveform.

Package Includes:

• 1 x KY-039 Finger Heartbeat Sensor Module