Opensource Optical Heart Rate Sensor/Pulse Sensor for Arduino
Channel: DFRobot
Date: 20/09/2017

In this episode, we are showcasing the Optical Heart Rate Sensor (SEN0203) and comparing PPG (Photoplethysmography) with ECG (Electrocardiography) technology as two general ways of measuring heart rate with Arduino, Raspberry Pi, and other microcontrollers.

The Optical Heart Rate Sensor (SEN0203) is developed based on PPG (Photoplethysmography) techniques. This is a simple and low-cost optical technique that can be used to detect blood volume changing in the microvascular bed of tissues. It is relatively easy to detect the pulsatile component of the cardiac cycle according to this theory.

The sensor has two holes that you can use to attach to your belt. You can wrap on your finger, wrist, earlobe or other areas where it has contact with skin.

For easier use,  a Gravity Interface is adapted to allow plug&play.  The IO sensor shield is the best match for this sensor connecting to your Arduino or other microcontrollers. The sensor is able to work at 3.3V which makes it compatible with Raspberry Pi, Intel Edison, Joule, and Curie. 

Input Voltage (Vin): 3.3 - 6V (5V recommended)
Output Voltage: 0 - Vin (Analog), 0/ Vin (Digital)
Operating current: no more than 10mA
Dimension: 28 x 24(mm), 1.102" x 0.945"(in)
Interface Type: PH2.0-3P

more on https://www.dfrobot.com/product-1540.html?tracking=5b603d54411d5