LifeX - The Life eXpectancy predictor

After brainstorming and presenting three proposals, we decided to build the LifeX, a modern version of glass balls. It’s a pretty useless machine that draws a line on a bookmark whose distance represents the life expectancy of the person who pressed the button to activate it.

Work in progress

Life X Code

    //Servomotor library
    #include <Servo.h>

    // Define stepper motor connections and steps per revolution:
    #define dirPin 2
    #define stepPin 3
    #define stepsPerRevolution 200

    //LCD settings
    #include <Wire.h> 
    #include <LiquidCrystal_I2C.h>
    LiquidCrystal_I2C lcd(0x27, 16, 2);

    //PEN ServoMotor
    Servo penMotor;  //define the servomotor
    int potpin = A1;  //define servomotor pin
    int val;          //variable for servomotor

    const int buttonPin = 4;  // the number of the pushbutton pin
    int buttonState = 0;      // variable for reading the pushbutton status

    const int buttonPin1 = 5;
    int buttonState1 = 0;
    int home = 0;
    int prediction = 0;
    int start = 0;

    long ranValue;

    void penUp(){
    //PEN UP
    delay(1000);
    val = 0;
    val = map(val, 0, 1023, 0, 180);  
    penMotor.write(val);    
    }

    void penDown(){
        //PEN DOWN
        val = 90;
        penMotor.write(val);
    }

    void setup() {

    Serial.begin(9600);
    // Declare pins as output:
    pinMode(stepPin, OUTPUT);
    pinMode(dirPin, OUTPUT);
    pinMode(buttonPin, INPUT);
    penMotor.attach(potpin);
    randomSeed(analogRead(0));

    lcd.begin();
    lcd.backlight();
    }

    void initit() {

    if ((buttonState == HIGH) && (home == 0)) {
        digitalWrite(dirPin, HIGH); 
        Serial.println("Reset...");    

        void penUp();
        prediction = 0;                      

        //Spin the stepper motor 5 revolutions fast:
        for (int i = 0; i < stepsPerRevolution; i++) {
        // These four lines result in 1 step:
        digitalWrite(stepPin, HIGH);
        delayMicroseconds(500);
        digitalWrite(stepPin, LOW);
        delayMicroseconds(500);
        }
    } else if (buttonState == LOW) {
        //Serial.println("Ready!");
        home = 1;
    }
    }

    void loop() {

    // read the state of the pushbutton value:
    buttonState = digitalRead(buttonPin);
    buttonState1 = digitalRead(buttonPin1);

    initit();

    if ((buttonState1 == LOW) && (home == 1)) {

        ranValue = random(0,23);  // 1000*20200
        ranValue = ranValue * 100;

        lcd.clear();
        lcd.setCursor(2,0);
        Serial.println("Predicting...");
        lcd.print("Predicting...");

        if (prediction == 0) {
        digitalWrite(dirPin, LOW);
        void penDown();

        for (int i = 0; i < ranValue; i++) {
            // These four lines result in 1 step:
            digitalWrite(stepPin, HIGH);
            delayMicroseconds(500);
            digitalWrite(stepPin, LOW);
            delayMicroseconds(500);
            prediction = 1;
        }
        //the prediction is done!
        lcd.clear();
        Serial.print("Your Lifex is: ");
        Serial.println(ranValue/23);
        lcd.setCursor(1,0);
        lcd.print("Your Lifex is: ");
        lcd.setCursor(7,1);
        lcd.print((ranValue/23)+10);

        //get back Home
        void penUp();
        delay(5000);
        home = 0;
        //initit();     
        } 
    }
    }

Final result

Presentation

Video

Slideshow