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Polygraph Made with Arduino

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    In this project, we will talk about making polygraph.First, let’s talk about how the polygraph works work Mantgum.When you tell people lie deep in the electrical conductivity varies depending on the excitement.We will form the basis of our machine utilizing the conductivity changes in the skin.Galvanic Skin Response from medical sensors for this (GSR) will use the measurement sensor.We can start our project.

    Materials:

    • Arduino
    • Galvanic Skin Response (GSR) Measurement Sensor
    • buzzer

     

    Electronic Circuit Connections

    The sensor supply voltage: 3.3V – 5V

    The sensor signal pin: Analog 1 pin

    GND: GND pins to

    Buzzer plus 4. Digital Pune

    Buzzer gnd: Gnd

    Software Part:

    const int buzzer_pin=4; //Buzzer pin
    const int gsr_sensor=A1; // sensör sinyal pini
    int ortalama_deger=0; // ortalama değeri
    int sensor_degeri; // sensör değeri
    
    void setup(){
    long toplam=0;
    Serial.begin(9600);
    pinMode(buzzer_pin,OUTPUT);
    digitalWrite(buzzer_pin,LOW);
    delay(1000);
    for(int i=0;i<500;i++)
    { sensor_degeri=analogRead(gsr_sensor); 
    toplam += sensor_degeri; delay(5); } 
    ortalama_deger = toplam/500;
     Serial.print("ortalama_deger ="); 
    Serial.println(ortalama_deger); } 
    void loop() { 
    int temp; 
    sensor_degeri=analogRead(gsr_sensor); 
    Serial.print("sensor_degeri=");
     Serial.println(sensor_degeri);
     temp = ortalama_deger - sensor_degeri;
     if(abs(temp)>50)
    {
    sensor_degeri=analogRead(gsr_sensor);
    temp = ortalama_deger - sensor_degeri;
    if(abs(temp)>50){
    digitalWrite(buzzer_pin,HIGH);
    delay(3000);
    digitalWrite(buzzer_pin,LOW);
    delay(1000);}
    }
    }

    The sensitivity of the sensor can be adjusted.These values will vary from person to person based on the person’s reference to the measured value in the event of a quiet excitement, hunger, fear as compared with the situation in these values can understand the status of the person accordingly.This difference will give buzzer alarm is activated when greater than 50 and people will be understood that lying is a difference between value and values of residents in a lie.

    The following excel calm person, hunger, excitement shown changes in circumstances.

    Calm the moment:

    Hungry the moment:

    Lie the moment:

     

     

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    1 Comment - "Polygraph Made with Arduino"

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    Dorie
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    Dorie

    hacen re linda pareja q lindos bien july salio diferente en una fotoooooo, medio cortada pero diosa siempre. july mi novio tambien es de bariloche, vamos los balisochensers .beso a peto, seba y pablo!

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