Sensors for Arduino , Finger Heartbeat Measurement Module With Demo Code

Specifications:

Finger heartbeat measurement  module

arduino test code:

int ledPin=13;
int sensorPin=0;

double alpha=0.75;
int period=20;
double change=0.0;

void setup()
{
 pinMode(ledPin,OUTPUT);
}

void loop()
{
 static double oldValue=0;
 static double oldChange=0;
 int rawValue=analogRead(sensorPin);
 double value=alpha*oldValue+(1-alpha)*rawValue;
 change=value-oldValue;

 digitalWrite(ledPin,(change<0.0&&oldChange>0.0));
 
 oldValue=value;
 oldChange=change;
 delay(period);
}

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5. 1 Year Factory Warranty
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