COUNTDOWN TIMER

TLIOB007

Jugaad's frined Rahul told him that he is preparing for a competitve exam in which there is a time limit for every question. He gets only 2 mins. to answer each question, and he is unable to keep the track of time. Rahul asks for some help from Jugaadu for the same. Can you help jugaadu to solve Rahul's problem?

Digital Kit

Connect Buzzer with Arduino, Switch and battery using connecting wires on bread-board.
Program the Arduino and upload the sketch Using A to B USB Cable.
Test it by power it on.


    int led=13;
 void setup() {
  // put your setup code here, to run once:
 pinMode(led,OUTPUT);
 Serial.begin(9600);
 }
 void loop() {
  // put your main code here, to run repeatedly:
  Serial.println("time start now");
 digitalWrite(led,HIGH);
 delay(10000);
 Serial.println("time over");
 digitalWrite(led,LOW);
 delay(2000);
 }