change program from seconds to minutes

Projects Programming
1

Hi,
I have a very simple program that times in seconds, I have tried everything I can to change to timing in minutes with no success, can anyone put me right please?

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#define lcd_end 16
#define lcd_address 0x27
#define lcd_lines 2
LiquidCrystal_I2C lcd(lcd_address, lcd_end, lcd_lines);
int runTimer = 1;
int runFor = 60; // time in seconds
int buzzerPin = 13;
int relayPin=4;
int data = 0;

void setup() {
lcd.begin();
lcd.backlight();
lcd.home();
lcd.print("Timing Test");
delay(3000);
}

void loop() {
if(runTimer == 1){
digitalWrite(relayPin,LOW);
lcd.clear();
lcd.print("TIMER=");
//Start timer
timer();
} else {
digitalWrite(relayPin,HIGH);

}
runTimer = 0;
lcd.noDisplay();
delay(250);
for(int duration = 0; duration < 100; duration ++){
digitalWrite(buzzerPin, HIGH);
delayMicroseconds(500);
digitalWrite(buzzerPin, LOW);
delayMicroseconds(500);
}
lcd.display();
delay(250);
}

void timer() {
for(int timer = runFor;timer > 0; --timer){
if(timer >= 10) {
lcd.setCursor(6,0);
} else {
lcd.setCursor(6,0);
lcd.print("0");
lcd.setCursor(7,0);
}
lcd.print(timer);
lcd.print(" SECOND!");
delay(1000);
}
lcd.setCursor(0,0);
lcd.clear();
lcd.print(" TIMER ALERT!");
}

2 
int runFor = 60; // time in seconds

Step 1: Fix the comment.

   delay(1000);

Step 2: Change how long you wait.

But, really, stuffing your head in the sand for one minute intervals is not a good idea.

Keep the timer wasting seconds, but waste 60 times as many of them. You COULD show the time remaining in minutes and seconds...

3

Thanks Paul,
I suddenly realised that I could /60 the time on the lcd to show minutes and increase the runFor the correct seconds.
Again many thanks for your reply