HEARTBEAT DETECTOR USING ARDUINO

Presented by:

Varsha Khandagale Sampada Kulkarni Himali Patil

Heart beat DetectorTaking your pulse is as simple as holding a finger to your neck or wrist and timing the beats with your watch.

But if you want to record the data or use it to trigger events, you need to turn that mechanical pulsing action into an electrical signal.

This sensor fits over a fingertip and uses the amount of infrared light reflected by the blood circulating inside to do just that.

Why Monitoring……?More than 2 million people are at high risk of having heart attack.

It would be helpful if there was a way for these people to monitor their heart.

So we have a problem. That is the way our project focuses on how we can utilize this problem and find a solution.

Measurement of Heart rate

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• Stethoscope --- inaccurate

• Electrocardiogram – costly

& not user friendly

What we have done? ? ?

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• We , in this project are measuring the heart beat using the IR pulse sensor and arduino.

• The timer we have set for counting the heart beat is 10s.

• There is a set point we can decide, after 10 s the heartbeat would be shown on the screen.

Software we used ? ? ?

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• Arduino IDE

• Processing

Top view of our project

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Hardware implementation

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• IR Led & Phototransistor• LM324 Quad Op Amp, 14 pin DIP

• Resistors & Capacitors• Connecting wires• Breadboard

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U1

LT1013

U2

LT1013

R1

8.2K

R2

39K

R3

220K

R4

68KR

68K

1K

R

R7

510K

C1

1µFC2

0.1µF

C3

1µF

C4

0.1µF

D2

3E1001D

Q1

FPT100A

V1

5V

C5

220µF

To digital pin 2

SCHEMATIC DIAGRAM :

HOW ? ? ?

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The sensor itself consists of an infrared emitter and detector mounted side-by-side and pressed closely against the skin.

When the heart pumps, blood pressure rises sharply, and so does the amount of infrared light from the emitter that gets reflected back to the detector.

The detector passes more current when it receives more light, which in turn causes a voltage drop to enter the amplifier circuitry.

This design uses two consecutive operational amplifiers (“op-amps”) to establish a steady baseline for the signal, emphasize the peaks, and filter out noise.

Both op-amps are contained in a single integrated circuit (IC or “chip”),

What is ‘ARDUINO’?It’s intended for students,

artists,designers,hobbyists and anyone who tinker with technology.

It is programmed in Arduino Programming language(APL) similar to C/C++.

Way more easy to program compared to other microcontroller packages.

The Arduino is a microcontroller development platform

It is the winner of “worlds best interaction award 2012” sponsered by google

Different flavoursThere are many versions of Arduino board.versions differ by

size,microcontroller,etc

Arduino Duemilanove

http://arduino.cc/en/uploads/Main/ArduinoDuemilanove.jpg

Pin 13 LED

USBconnector

Barrel jack

Digital pins header

Reset button

ATmega328 MCU

Analog pins header

Power-ground header

Arduino Duemilanove/Uno FeaturesMicrocontroller ATmega168/328

Operating Voltage 5V

Input Voltage (recommended) 7-12V

Input Voltage (limits) 6-20V

Digital I/O Pins 14 (of which 6 provide PWM output)

Analog Input Pins 6

DC Current per I/O Pin 40 mA

DC Current for 3.3V Pin 50 mA

Flash Memory16 KB (ATmega168) or 32 KB (ATmega328) of which 2 KB used by bootloader

SRAM 1 KB (ATmega168) or 2 KB (ATmega328)

EEPROM 512 bytes (ATmega168) or 1 KB (ATmega328)

Clock Speed 16 MHz

Board Type

Serial Port / COM Port

The Environment

PROGRAM

Processing? Processing is a free, open source,

cross-platform programming language and environment for people who want to create images, animations, and interactions.

Created in 2001 by Casey Reas and Ben Fry at the MIT Media Lab.

Downloads, updates, reference, forums, etc. at: http://processing.org

Anatomy of a sketch

A sketch is a file or project you create in Processing. When you first open up a new sketch it will be completely blank.

Setup()This function runs once, at the very beginning of your sketch.You will use setup to set up certain aspects of your sketch, makes sense right?Most importantly for this class you will begin Serial communication in the setup function. The setup function without anything in it looks like this:

Draw()This function is where everything happens in your sketch.The draw loop is the portion of code that keeps repeating while the Processing sketch is open. The draw loop looks like this:

Basic Graphics we will be usingpoint (x, y);background(color);ellipse (x, y, width, height);fill (red, green, blue, transparency);rect(x, y, width, height);

ReferenceOne very convenient way to access Processing’s Help Reference is to highlight a function or a word used in your code, right click and select Find in Reference (which brings you to the processing.org reference page):

Limitations

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In-accurate method of calculating heartbeat.

Logic used iS very simple. Therefore, results may vary as for a sophisticated instrument for the same purpose

Future scope• EEG, ECG and other health

parameters can also be monitored.• Continuous monitoring and future

diagnosis can be performed via the same system (TELEMEDICINE).

• More than a single patient at different places can be monitored using such system.

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Thank you