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Pulse Sensor


Pulse sensor is a well designed Plug and Play sensor through which user can take live heart rate or pulse rate data and can feed it wherever it wants.

The heartbeat sensor is based on the principle of photophlethysmography i.e. Heart Beat can be measured based on optical power variation as light is scattered or absorbed during its path through the blood as the heart beat changes. This means that the sensor measures the change in volume of blood through any organ of the body which causes a change in the light intensity through that organ. The flow of blood volume is decided by the rate of heart pulses and since light is absorbed by blood, the signal pulses are equivalent to the heart beat pulses.

There are two types of Photophlethysmography:

Transmission: Light emitted from the light emitting device is transmitted through any vascular region of the body like earlobe and received by the detector.

Reflection: Light emitted from the light emitting device is reflected by the regions.


Pulse Sensor can be used in the places where live pulse rates are needed. Some common examples are 3D Gaming, Athletics, Smart Phones etc.


Project for Reference:


GND of Arduino – GND Sensor

VCC Arduino – VCC Sensor

A0 Arduino – Signal pin of Sensor


Analyse output at serial monitor.