// How to Make Auto Power OFF Circuit with Arduino?
// https://circuitjournal.com/arduino-auto-power-off#:~:text=To%20shut%20down%20the%20Arduino,Digital%20Output%20D7%20to%20LOW.

/*
How to Make Auto Power OFF Circuit with Arduino?
The charge of a battery is limited. It would be nice if your battery-powered device could power itself OFF if it has been idle for some time.

With a couple of MOSFETs and some resistors, you can create a circuit that makes it possible for your Arduino to use a Digital Output pin to shut itself OFF.

In this article, I am going to explain step-by-step how to make the connections. First, let's make the basic connections, and then optionally, we can add some wires 
to read the push button status in your Arduino code.




*/

long shutdownTimer = 0;

void setup() {
    
  pinMode(10, INPUT_PULLUP);                // PCB Me Switch na lagaye But Code me rahne de
  pinMode(7, OUTPUT);                        // hold the power mosfet ON // Ye +ve voltage N-Channel Mosfet k Gate par ja kar use On mode me layega 
  digitalWrite(7, HIGH);                     // Dhyan rahe Suru se hi Pin7 HIGH declare hai....yani Shutdown time = 180000; k baad hi LOW hoga 
  
}

void loop() {
  
  while (millis() - shutdownTimer < 30000) {     // wait for the shut-down timer // 5000// iss timer se Power Mosfet iss time tak hold rahta hai...yani Pin7 HIGH rahti hai
                                                // Aur agar Running yani Shutdown time = 180000; k bich me hi if the button is pressed (pin 10 is pulled to ground)then (extra Time add ho jayega )extend shutdownTimer and blink the on-board LED
     
    if (!digitalRead(10)) {
      shutdownTimer = millis();
     
    }
  }
  
  digitalWrite(7, LOW);                        // when the time is up then shut it down
  delay(1000);                                 // give it time to shut down
}