Pulse Heart beat sensor

A pulse heart rate sensor is an electronic device that measures a person’s heartbeat in real-time by tracking changes in blood volume.How it WorksThe sensor uses Photoplethysmography (PPG), an optical measurement technique:

• Light Emission: A green LED shines light into a thin area of skin, like a fingertip.
• Absorption: Oxygen-rich blood absorbs this green light.
• Detection: As the heart pumps, blood volume rises and falls rhythmically.
• Output: A photodetector measures the reflected light changes and converts them into a voltage waveform.

Hardware & PinoutThe sensor module filters out ambient noise and amplifies the heartbeat signal using three pins:

• VCC: Power supply (3V to 5V).
• GND: Ground connection.
• Signal: Analog output voltage connected to a microcontroller.

Popular Alternatives

• Standard Pulse Sensor: Optical (PPG) sensor best for finger or earlobe clips.
• MAX30102: Optical IC sensor that measures both heart rate and blood oxygen (SpO).
• AD8232: Electrocardiography (ECG) sensor that tracks the heart’s electrical activity using skin pads.

(Note: These modules are for hobbyist prototyping and are not medical devices.)