I keep getting a very deep Q wave. How do I fix this issue? Can provide pictures if needed

SparkFun Single Lead Heart Rate Monitor.

How would I get this kit to output to a small LCD or TFT screen without the use of a PC?

I added the saveFrame("heart.jpg"); // saves previous frame must stop the program after the frame you want in the processing Heart_rate_display code. It saves the screen to a jpg file at the end of every screen. Then stop the program on the next screen. See below. You can save every screen if you want, see : https://processing.org/reference/saveFrame_.html

// at the edge of the screen, go back to the beginning: if (xPos >= width) { saveFrame("heart.jpg"); // saves previous frame must stop the program after the frame you want xPos = 0; background(0xff);

  } 

How do you guys get over the whole danger of people thinking this is a medical device? Is the "Note" at the bottom enough? I also noticed there was no "battery-powered only" warnings.

Hello, I've been many problems with the code in Processing, please help me;

the error is this: ArrayIndexOutOfBoundsException:3.

P.S. My arduino Uno is COM3. I've tried many ways to solve my problem but I Didn't get it.

this is my code:

import processing.serial.*;

Serial myPort; // The serial port

int xPos = 1; // horizontal position of the graph

float height_old = 0;

float height_new = 0;

float inByte = 0;

void setup () {

// set the window size:

size(1000, 400);

// List all the available serial ports

println(Serial.list()); // Open whatever port is the one you're using.

myPort = new Serial(this, Serial.list()[3], 9600);

// don't generate a serialEvent() unless you get a newline character:

myPort.bufferUntil('\n');

// set inital background:

background(0xff);

}

void draw () {

// everything happens in the serialEvent()

}

void serialEvent (Serial myPort) {

// get the ASCII string:

String inString = myPort.readStringUntil('\n');

if (inString != null) {

// trim off any whitespace:

inString = trim(inString);



// If leads off detection is true notify with blue line

if (inString.equals("!")) { 

  stroke(0, 0, 0xff); //Set stroke to blue ( R, G, B)

  inByte = 512;  // middle of the ADC range (Flat Line)

}

// If the data is good let it through

else {

  stroke(0xff, 0, 0); //Set stroke to red ( R, G, B)

  inByte = float(inString); 

 }



 //Map and draw the line for new data point

 inByte = map(inByte, 0, 1023, 0, height);

 height_new = height - inByte; 

 line(xPos - 1, height_old, xPos, height_new);

 height_old = height_new;



  // at the edge of the screen, go back to the beginning:

  if (xPos >= width) {

    xPos = 0;

    background(0xff);

  } 

  else {

    // increment the horizontal position:

    xPos++;

  }

}

}

The values which we get from AD8232 are as follows: 483 481 480 485 492 501... What are these values ? Are these voltages or what?

Hello everyone. Can this sensor measure also the muscolar contraction?

Thank you all!

Hi i am trying to send the ECG signal via wireless to the PC to processing(maybe). Is there.

i use arduino uno. My all connections are true. I always get square wave. Please help.

I cant understand what is reason this?

any ideas on how to filter the noise for movements? I'm trying to do a heart rate monitor for running using chest straps (like a polar). but I'm not able to filter the noise.... any advises would be great

Hi

I have recently purchased the board, however, even the standard examples do not work for some reason! I get always something like this in my serial monitor (sketch from the example was used):

697 698 697 ! 696 697 698 ! 698 698 ! 697

Moreover, the LED which is supposed to indicate heart beat is not blinking and it is always red! The only difference in my setup is that I have connect the board to the A2 analog pin. I have also soldered male pins to the board (LA, RA, LR).

Am I doing something wrong? Has anyone faced similar problem with this product? Can it be so, that those soldered extra pins affect on the functioning of AD 8232?

Was trying this with multiple Arduino boards and was happy to know that it works on all! However, the signal I had a problem. The T part of the wave has the same amplitude as the R peak, is there anything I can do to remedy this problem? I tried it with a few of my friends too and the results are all the same.

Can I use the monitor with an Arduino Yun? Coz I am working on a wireless ECG monitor and other similar projects. Please reply me the advantages and drawbacks of using this with an yun..

does this heart rate monitor sensor board, leads and the cable follow any industrial standard (e.g., http://www.fda.gov/MedicalDevices/DeviceRegulationandGuidance/GuidanceDocuments/ucm073942.htm#14_3) during the design, manufacture and post manufacture quality test? how safe is it to connect to a human body directly following your hookup guide? is there any known potential risk when applied to human?

Hi! Would you recommend this device for measuring biosignals from plants?

Has anyone used this ECG board with two leads/electrodes? The reason I ask is because I see an error in the schematic. R18, which is not installed for 3-lead configuration, should go to RLD and not to SW. Refer to fig 62 on page 24 of the AD8232 datasheets.

Best Regards

How difficult would it be to have the rate be displayed on a 16x2 LCD ?

Does anyone know if I can use Arduino Uno ?

This works great for me!

However, I ordered my own PCB that was identical to yours (I copied the eagle brd file) and tried populating it myself and it didn't work..

I've tried both reflow and hand soldering and neither method has produced a working board for me.

Do you have documentation on how you populate your boards? Did you run into any similar problems when first working with this IC?

Hi,

I've been trying to get a proper output of this board, and all I get is a square wave ranging from 200+ to 800+... does anyone know why this may be? I'm setting !SDN to 3.3V since I'm not using the functionality to turn off and on... and I set AC/!DC to GND that's the only difference I did...

Thanks in advance for the help

with operating voltage at 3.3V, what is the analog output range of this Single Lead Heart Rate Monitor - AD8232 (0-1.5V)?

Have connected this to a Arduino pro mini 328 and that in turn connects to a Raspberry Pi to run the processing. Both the Pro Mini and AD8232 run off of the 3.3v GPIO, whilst I get a good trace I also pick up 50hz (UK) noise and although adding a few caps diminishes it is still quite noticeable.

Any thoughts of how to lower the noise? For example would it be good to run the Arduino and AD8232 from their own 3.3v regulators and have these use caps to lower the noise also? Any help would be appreciated as the pro mini 3.3v 328 & Pi make a great combination.

Any idea the difficulty to solder this with the SparkFun hot air rework station? Also the actual or best temperature to warm the hot air rework station at? I know I should look at the datasheet, but anyone got any first hand experience? sometimes real-life experience works better than datasheets... and these chips don't grow on trees :)...

thanks

I plan to use this without a micro-controller. Any suggestions on how to power this? What is the voltage range it will actually accept, still function and not burn? Is 3.3V a hard upper limit or will it accept 5V or 9V? What about in the other direction, like 3.0V from a coin battery or 2xAA betteries?

In the tutorial, the pin connection table shows LO- is connected to Pin 11 on arduino and LO+ is connected to Pin 10. However, on the connection diagram graph, LO- is not connected to arduino and LO+ is connected to Pin 11 in green wire. ??

can i connect the pads to the wrist? or do the 3 pads have to be connected at the heart area?

Great little module: Works as advertised with sample code. Thanks!

Added a few lines to Casey's excellent processing code to give multiline, 200ms tick marks, and screenshotting

/******************************************************************************
Heart_Rate_Display.ino
Demo Program for AD8232 Heart Rate sensor.

Casey Kuhns @ SparkFun Electronics
6/27/2014
https://github.com/sparkfun/AD8232_Heart_Rate_Monitor

Some mods by Humphrey Gardner  humphrey@hapitek.com
8/6/2014
Now five lines of EKG, tick marks every 200ms, click on frame to save to the executable's directory

The AD8232 Heart Rate sensor is a low cost EKG/ECG sensor. This example shows

how to create an ECG with real time display. The display is using Processing.

This sketch is based heavily on the Graphing Tutorial provided in the Arduino

IDE. http://www.arduino.cc/en/Tutorial/Graph


Resources:

This program requires a Processing sketch to view the data in real time.


Development environment specifics:

IDE: Arduino 1.0.5
Hardware Platform: Arduino Pro 3.3V/8MHz
AD8232 Heart Monitor Version: 1.0


This code is beerware. If you see me (or any other SparkFun employee) at the

local pub, and you've found our code helpful, please buy us a round!


Distributed as-is; no warranty is given.

******************************************************************************/


import processing.serial.*;


Serial myPort; // The serial port

int xPos = 1; // horizontal position of the graph

int tick=millis();

float height_old = 0;

float height_new = 0;

float inByte = 0;

int baseheight=100;



void setup () {

  // set the window size:
  size(1600, 800);


  // List all the available serial ports

  println(Serial.list());

  // Open whatever port is the one you're using.

  myPort = new Serial(this, Serial.list()[1], 9600);

  // don't generate a serialEvent() unless you get a newline character:

  //myPort.bufferUntil('\n');

  // set inital background:
  background(0xff);
}


void draw () {

  // everything happens in the serialEvent()
}


void serialEvent (Serial myPort) {

  // get the ASCII string:
  String inString = myPort.readStringUntil('\n');


  if (inString != null) {

    // trim off any whitespace:
    inString = trim(inString);


    // If leads off detection is true notify with blue line

    if (inString.equals("!")) {

      stroke(0, 0, 0xff); //Set stroke to blue ( R, G, B)

      inByte = 512; // middle of the ADC range (Flat Line)

    }
    // If the data is good let it through
    else {

      stroke(0xff, 0, 0); //Set stroke to red ( R, G, B)

      inByte = float(inString);

     }

     //Map and draw the line for new data point

     inByte = map(inByte, 0, 512, 0, height/16);

     height_new = inByte;

     line(xPos - 1, baseheight-height_old , xPos, baseheight-height_new);

     height_old = height_new;

     //tickmark for 200 mseconds
     if (tick+200<=millis()){
       stroke(0, 0xff, 0); //Set stroke to green ( R, G, B)
       line(xPos, baseheight-20, xPos,baseheight+20);
       tick=millis();
     }
    //screen print if wished

    if(mousePressed) { 
       saveFrame(); 
    }
      // at the edge of the screen, go back to the beginning:

      if (xPos >= width) {

        xPos = 0;
        baseheight+=200;
      if (baseheight>height-100){
        xPos = 0;
        baseheight=100;

        background(0xff);}

      }
      else {
        // increment the horizontal position:

        xPos++;
      }

  }
}

Is it electrically isolated from the power supply?

When I followed the tutorial to try it, the plot is upside down. Any idea?

Why does this use RL (right leg) i stead of the commonly used LL (left leg) for 3lead ECG

hey!.... the last answer is 38 minutes and 20 seconds.... Awsome video! I love you SparkFun. Thank you Robert to be on time every friday. You make me dream, thanks a bunch!

If my calculations are correct, the Cut-off frequency of this device is at or around 41Hz.... I'm just wondering if that seems a bit low? or I guess since its within the 0.5 - 150 Hz range shouldn't matter? Smart... then you remove most of the 60 Hz signal noise

The github repo doesn't appear to exist!

The eagle files link takes us to the schematic, and the github link to a 404 website. Just letting you know, in case you can modify this.

Thanks

On the Connecting the Hardware page of the tutorial for this, it says: "The four pins you need are labeled GND, 3.3v, OUTPUT, LO-, and LO+"

Um..., that be five pins, folks. :-)

Primary protection against electric shock is provided by the resistors in series with the arm and leg leads. SF should confirm that those resistors also are rated for >36V insulation resistance and that the clearances of the leads are sufficient for that voltage. Although SF customers are generally savvy, my rule for design of such devices is that they should not conduct even if an idiot user touches 120V and the device is earth-grounded.

Did you add the AD8232 and 3.5mm stereo jack to the SF eagle library?