KY-039 Simple Heartbeat Sensor Module

Description

This KY-039 Finger Detection Heartbeat Measuring Sensor Module uses bright infrared (IR) LED and a phototransistor to detect the pulse of the finger, a red LED flashes with each pulse.

The LED is the light side of the finger, and the phototransistor on the other side of the finger, phototransistor used to obtain the flux emitted, when the blood pressure pulse by the finger when the resistance of the phototransistor will be slightly changed.

For home lighting that is particularly important because the lights at home mostly based 50HZ or 60HZ fluctuate, so faint heartbeat will add considerable noise.

Example Code:

// Pulse Monitor Test Script
int sensorPin = 0;
double alpha = 0.75;
int period = 100;
double change = 0.0;
double minval = 0.0;
void setup ()
{
  Serial.begin (9600);
}
void loop ()
{
  static double oldValue = 0;
  static double oldChange = 0;

  int rawValue = analogRead (sensorPin);
  double value = alpha * oldValue + (1 – alpha) * rawValue;

  Serial.print (rawValue);
  Serial.print (“, ”);
  Serial.println (value);
  oldValue = value;

  delay (period);
}

 

Features :

1. Use IR LED and an optical transistor to detect pulsation in fingers
2. Small and Compact module
3. Easy to use.

Package Includes :

1 x KY-039 Simple Heartbeat Sensor Module