PULSE SENSOR

Pulse sensor also known as Heartbeat sensor or heart rate sensor used to determine live heart rate data. Nowadays Heart rate data is widely used in most electronics projects. The working of this sensor is by simply connecting it from the fingertip or human ear to the Arduino board. The 24-inch colour code cable with standard male header connectors makes an easy connection to Arduino or a Breadboard. The Heart logo on the side is made in contact with the skin. A small round hole, which is where the LED shines through from the back, and there is also a little square just under the LED. This square consists of an ambient light sensor, used to adjust the screen brightness in different light conditions.

This sensor consists of two surfaces. Firstly, the light-emitting diode & ambient light sensor is connected. Next, on the second surface, the circuit is connected which is accountable for the noise cancellation& amplification. Pulse Sensor Amped adds this circuitry to the hardware, thus providing fast and easy to get reliable pulse readings.

The LED on the small round hole is placed above a vein in a human body like anear fingertip. Once the LED is fixed on the vein, then the LED starts emitting light. When the heart is pumping, then there will be a flow of blood within the veins. As a result, if we check the blood flow, then we can check the heart rates also. When the blood flow is sensed, the ambient light sensor will receive more light as it will be reproduced by the flow of blood. Hence this small change within obtained light is used to determine pulse rate.

Pulse-Sensor-Pin-Configuration

• Pin-1: GND: Black Colour Wire – Connected to the GND terminal
• Pin-2: VCC: Red Colour Wire – Connected to the supply voltage ( +5V otherwise +3.3V)
• Pin-3: Signal: Purple Colour Wire – Connected to the pulsating o/p signal.