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KY-039 5V Finger Detection Heartbeat Sensor Module Detector For Arduino

৳ 150.00

Pulse monitor works as follows: The LED is the light side of the finger, and 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 slight changed.
With a very high resistance resistor R1, because most of the light through the finger is absorbed,it is desirable phototransistor sensitive enough.Resistance can be selected by experiment to get the best results.
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Description

Finger Heartbeat Sensor module

KY-039 5V Finger Detection Heartbeat Sensor Module Detector For Arduino

Product Description: Finger heartbeat sensor module

The KY-039 Finger Detection Heartbeat Sensor Module can be used to detect the heartbeat signal using finger. This sensor has an analog output. By placing your finger on the module, you can see the heartbeat signal through the analog output pin. We chose a very high resistance resistor R1 because most of the light through the finger is absorbed, it is desirable that the phototransistor is sensitive enough. Resistance can be selected by experiment to get the best results. The most important is to keep the shield stray light into the phototransistor.

Specification:(Finger Heartbeat Sensor Module)

  • KY-039 Finger Detection Heartbeat Sensor is a Low cost Heart beat Sensing Module. This Heart beat detection module uses bright infrared (ir) led and a photo-transistor to detect the pulse of the finger, a red led flashes with each pulse.
  • Pulse monitor works as follows: the led is Turned ON on one side of the finger, and photo-transistor is on the other side of the finger.
  • The photo-transistor used to obtain the flux emitted, when the blood flows through the finger then the resistance of the photo-transistor will be vary slightly.
  • The most important is to keep the shield stray light into the photo-transistor. 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.
  • Use IR LED and an optical transistor to detect pulsation in fingers
  • Small and Compact module
  • Easy to use.

Connecting Heart Beat Module to Arduino:Finger (Finger Heartbeat Sensor module)

1. Sensor pin S connect to Arduino pin Analog 0 / A0

2. Sensor pin + (middle pin) connect to Arduino pin 5+

3. Sensor pin – connect to Arduino pin GND

Package includes: Finger heartbeat sensor module
1 x Finger Detection Heartbeat Sensor
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);
}

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Robo Tech Valley

Arduino Uno R3

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