Pages

Monday 25 May 2015

ANALOG HEART BEAT SENSOR

OVERVIEW

INTRODUCTION

The Heart Beat Sensor is designed to provide analog output of heart beat when a finger is placed on it. When the Heart detector starts working, the top most LED will starts flashing with every heart beat. The output of this sensor can be connected to Micro Controller directly to measure the heart beat. It functions on the principle of light modulation by blood flow through the nerves of the finger at every pulse. The module output mode, analog output mode is simple.

FEATURES

  • Heart beat indication by LED
  • Instant output analog signal for directly connecting to micro controller
  • Module output mode, analog output is simple.
  • Compact Size
  • Working Voltage +5V DC
  • High quality PCB FR4 Grade with FPT Certified.

WORKING

Connect gnd to ground  ,Vcc to +5v of any board connect Out  to  any of the port pins





Keep the finger in between the phototransistor and IRdiode  as shown in the fig
Check the variation in LED.It counts the number of pulses

ARDUINO CODE

int count=0;
void setup() {
  Serial.begin(9600);                             // initialize serial communication at 9600 bits per second
  pinMode(8, INPUT);
}

void loop()                                                    // the loop routine runs over and over again forever:
{
  for(int i=0;i<120;i++)      
{
  if(digitalRead(8)==0)
  {
    count++;
  }
  delay(500);
 }
 Serial.println("heatbeat rate=");
  Serial.println(count);
  count=0;
  delay(1);                                                                               // delay in between reads for stability
}

OUTPUT



RELATED PRODUCTS



Phototransistor- L14F1           

IR Diode-Rx

ATMEL Project Board        
                                                                 
 PIC project board