Finger Heart Rate Sensor

This Finger Heart Rate Sensor is used Sensitive infrared (IR) LED to detect the pulse of the finger, a red LED flashes with each pulse. This sensor can use to measure the heart beat rate of the finger. 

Sometimes sensor sensitivity is not enough to get the heart rate of the finger, because light through the finger is absorbed. To increase the sensitive of the sensor, changer the value of the R1 resistor to higher resistance resister.  Default R1 resister of the sensor is 10kohms.