Zeeshan
Published

Quizmo

A gadget to help your kids practice basic arthematics.

IntermediateShowcase (no instructions)6 hours2,496
Quizmo

Things used in this project

Hardware components

Arduino UNO
Arduino UNO
×1
Standard LCD - 16x2 White on Blue
Adafruit Standard LCD - 16x2 White on Blue
×1
Adafruit 4x3 Keypad
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

Read more

Schematics

Block Diagram

This is how whole system must look like

Code

Arduino Code

C/C++
Upload this code directly to UNO and make sure you use the wiring similar to mentioned in code
#include <Keypad.h>
#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

long rand1,rand2,ans,ans1,opr,score,total;
char selec,selec1;
boolean quiz=false;
String stringTwo;

const byte ROWS = 4; //four rows
const byte COLS = 3; //three columns
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};
byte rowPins[ROWS] = {10, 9, 8, 7}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {6,1,0}; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup(){
  lcd.begin(16, 2);
  mk_menu();
  keypad.addEventListener(keypadEvent);
}
  
void loop(){
  selec = keypad.getKey();
  while (selec==NO_KEY){ 
    selec = keypad.getKey();
  }
  lcd.print(selec);
  delay(500);
  if (selec!=NO_KEY){
    switch(selec){
      case '1':
         quiz=true;
         opr=1;
         quiz_sum();
      break;
      case '2':
        quiz=true;
        opr=2; 
        quiz_subt();
      break;
      case '3':
        quiz=true;
        opr=3; 
        quiz_mult();
      break;
    }
  }
}

void mk_menu(){
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("1)+ 2)- 3)x");
  lcd.setCursor(0, 1);
  lcd.print("Choose: ");
}
void quiz_sum(){
    lcd.clear();
    lcd.setCursor(0, 0);
    rand1=random(1,99);
    rand2=random(1,99);
    lcd.print("Find ");
    lcd.print(rand1);
    lcd.print("+");
    lcd.print(rand2);
    lcd.print("?");
    ans1=rand1+rand2;
    selec1 = keypad.getKey();
    while (selec1==NO_KEY){ 
      selec1 = keypad.getKey();
    }  
    while (quiz){
      while (selec1==NO_KEY){ 
      selec1 = keypad.getKey();
    }
     switch(selec1){
      case NO_KEY:
         break;
      default:
        lcd.print(selec1);
        stringTwo.concat(selec1);
        ans=stringTwo.toInt();
        //lcd.print(stringTwo);
        selec1=NO_KEY;
        break;
    }
  }
}

void quiz_subt(){
    lcd.clear();
    lcd.setCursor(0, 0);
    rand1=random(1,99);
    rand2=random(1,99);
    lcd.print("Find ");
    if(rand1>=rand2){
      lcd.print(rand1);
      lcd.print("-");
      lcd.print(rand2);
      ans1=rand1-rand2;
    }
    else if(rand1<rand2){
      lcd.print(rand2);
      lcd.print("-");
      lcd.print(rand1);
      ans1=rand2-rand1;
    }
    lcd.print("?");
    selec1 = keypad.getKey();
    while (selec1==NO_KEY){ 
      selec1 = keypad.getKey();
    }  
    while (quiz){
      while (selec1==NO_KEY){ 
      selec1 = keypad.getKey();
    }
     switch(selec1){
      case NO_KEY:
         break;
      default:
        lcd.print(selec1);
        stringTwo.concat(selec1);
        ans=stringTwo.toInt();
        //lcd.print(stringTwo);
        selec1=NO_KEY;
        break;
    }
  }
}

void quiz_mult(){
    lcd.clear();
    lcd.setCursor(0, 0);
    rand1=random(1,12);
    rand2=random(1,12);
    lcd.print("Find ");
    lcd.print(rand1);
    lcd.print("x");
    lcd.print(rand2);
    lcd.print("?");
    ans1=rand1*rand2;
    selec1 = keypad.getKey();
    while (selec1==NO_KEY){ 
      selec1 = keypad.getKey();
    }  
    while (quiz){
      while (selec1==NO_KEY){ 
      selec1 = keypad.getKey();
    }
     switch(selec1){
      case NO_KEY:
         break;
      default:
        lcd.print(selec1);
        stringTwo.concat(selec1);
        ans=stringTwo.toInt();
        //lcd.print(stringTwo);
        selec1=NO_KEY;
        break;
    }
  }
}

void chk_ans(){
  lcd.clear();
  if (ans1==ans){
     lcd.clear();
     lcd.print("Correct");
     score=score+1; 
  }
  else {
     lcd.clear();
     lcd.print("Incorrect");
  }
}
void keypadEvent(KeypadEvent key){
    switch (keypad.getState()){
    case PRESSED:
        if (key == '*') {
            chk_ans();
            total=total+1;
            stringTwo="";
            delay(400);
            if(opr==1){
              quiz_sum();
            }
            else if(opr==2){
              quiz_subt();
            }
            else if(opr==3){
              quiz_mult();
            }
        }
        else if (key == '#') {
            quiz=false;
            stringTwo="";
            lcd.clear();
            lcd.print("Your Score: ");
            lcd.print(score);
            lcd.print("/");
            lcd.print(total);
            delay(1500);
            score=0;
            total=0;
            mk_menu();
            loop();
        }
        break;
    }
}

Credits

Zeeshan

Zeeshan

13 projects • 50 followers
Creative and destructive design master. Ability to use the brain waves for both construction and destruction

Comments

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  • Arduino