The 5 channel quiz control system with auto reset facility is a unique project with Arduino nano. There is no need to reset the system everytime by the quiz taker judges panel. It automatically resets after each round of questioning. The code is incomplete given as a sample.

Arduino nano 5 Channel Quiz Control System with Auto Reset Facility

/*
 * Arduino Nano based 5 Channel Quiz Controlling System with automatic reset
 * Yash Vidyasagar
 * www.vsa.edu.in
 * Date: 17.12.2019
 *
/* 
    ======= Connection details =======
    Switches connections: 
    player1: A0, player2: A1, player3: A2, player4: A3, player5: A4
    LED1: pin-D2, LED2: pin-D3, LED3: pin-D4, LED4: pin-D5, LED5: pin-D6
    Buzzer: pin-D7
*/

int x=1;
int LED1=2;
int LED2=3;
int LED3=4;
int LED4=5;
int LED5=6;
int buzzer=7; 

void setup() 
{
  pinMode(A0,INPUT); // player1 switch input
  pinMode(A1,INPUT); // player2 switch input
  pinMode(A2,INPUT); // player3 switch input
  pinMode(A3,INPUT); // player4 switch input
  pinMode(A5,INPUT); // player5 switch input *** A4 was faulty in my kit, so used A5 ***
  
  pinMode(LED1,OUTPUT);
  pinMode(LED2,OUTPUT);
  pinMode(LED3,OUTPUT);
  pinMode(LED4,OUTPUT);
  pinMode(LED5,OUTPUT);

  pinMode(buzzer,OUTPUT);
  reset();
  delay(1000);
  reset();
  delay(1000);
  reset();
  delay(1000);
  reset();
  delay(1000);
}

void loop() 
{
  int a=digitalRead(A0);   // reading pin values for 5 buttons
    int b=digitalRead(A1);


 
  void reset()
  {
    for(int i=0;i<4;i++)
    {
    digitalWrite(LED1,HIGH);
    digitalWrite(LED2,HIGH);
    digitalWrite(LED3,HIGH);
    digitalWrite(LED4,HIGH);
    digitalWrite(LED5,HIGH);
    digitalWrite(buzzer,HIGH);
  }