Pulse Sensor

Pulse Sensor

Pulse Sensor is an open source heart rate detector that detects the heart rate through the light transmittance change with blood vessel beat.

Circuit

Download PulseSensor_Amped_Arduino-master.zip file from below link unzip it, and move it to your Documents/Arduino folder

https://github.com/WorldFamousElectronics/PulseSensor_Amped_Arduino

0pen project in Arduino via *File > Sketchbook > PulseSensor_Arduino-Master > PulseSensorAmped_Arduino_1dot2.ino

In above code static boolean serialVisual=false

Change the value ” false to true” then run the code

/* Pulse Sensor Amped 1.4 by Joel Murphy and Yury Gitman http://www.pulsesensor.com

---------------------- Notes ---------------------- ---------------------- 
This code:
1) Blinks an LED to User's Live Heartbeat PIN 13
2) Fades an LED to User's Live HeartBeat
3) Determines BPM
4) Prints All of the Above to Serial

Read Me:
https://github.com/WorldFamousElectronics/PulseSensor_Amped_Arduino/blob/master/README.md 
---------------------- ---------------------- ----------------------
*/

// Variables
int pulsePin = 0; // Pulse Sensor purple wire connected to analog pin 0
int blinkPin = 13; // pin to blink led at each beat
int fadePin = 5; // pin to do fancy classy fading blink at each beat
int fadeRate = 0; // used to fade LED on with PWM on fadePin

// Volatile Variables, used in the interrupt service routine!
volatile int BPM; // int that holds raw Analog in 0. updated every 2mS
volatile int Signal; // holds the incoming raw data
volatile int IBI = 600; // int that holds the time interval between beats! Must be seeded! 
volatile boolean Pulse = false; // "True" when User's live heartbeat is detected. "False" when not a "live beat". 
volatile boolean QS = false; // becomes true when Arduoino finds a beat.

// Regards Serial OutPut -- Set This Up to your needs
static boolean serialVisual = true; // Set to 'false' by Default. Re-set to 'true' to see Arduino Serial Monitor ASCII Visual Pulse


void setup(){
pinMode(blinkPin,OUTPUT); // pin that will blink to your heartbeat!
pinMode(fadePin,OUTPUT); // pin that will fade to your heartbeat!
Serial.begin(115200); // we agree to talk fast!
interruptSetup(); // sets up to read Pulse Sensor signal every 2mS 
// IF YOU ARE POWERING The Pulse Sensor AT VOLTAGE LESS THAN THE BOARD VOLTAGE, 
// UN-COMMENT THE NEXT LINE AND APPLY THAT VOLTAGE TO THE A-REF PIN
// analogReference(EXTERNAL); 
}


// Where the Magic Happens
void loop(){

serialOutput() ; 

if (QS == true){ // A Heartbeat Was Found
// BPM and IBI have been Determined
// Quantified Self "QS" true when arduino finds a heartbeat
fadeRate = 255; // Makes the LED Fade Effect Happen
// Set 'fadeRate' Variable to 255 to fade LED with pulse
serialOutputWhenBeatHappens(); // A Beat Happened, Output that to serial. 
QS = false; // reset the Quantified Self flag for next time 
}

ledFadeToBeat(); // Makes the LED Fade Effect Happen 
delay(20); // take a break
}

void ledFadeToBeat(){
fadeRate -= 15; // set LED fade value
fadeRate = constrain(fadeRate,0,255); // keep LED fade value from going into negative numbers!
analogWrite(fadePin,fadeRate); // fade LED
}