MAX30105 Breakout – Heart Rate, Oximeter, Smoke Sensor

This sensor has three LED—green, red, and infra-red—and photodetectors that can be used together to detect the amount of light reflected back to the sensor. A technique called photoplethysmography (PPG) can be used to detect the change in colour of your skin with each beat of your heart when the sensor is pressed against your fingertip. You can use the MAX30105 to detect particles in the air, like smoke, by measuring the amount of light bounced back to the sensor by the particles.