Arduino self shutdown using relay not working - arduino

Question

I'm working on a project that need to shutdown arduino main power (not sleep) to save battery.
Follow this tutorial:
zola lab
Here is Zola scheme (i choose the relay option):
And here what i have done:
The code:
// www.zolalab.com.br - By Eduardo Zola - 2016
void setup()
{
pinMode(7,OUTPUT); // Relay Signal Pin
digitalWrite(7,HIGH);
pinMode(8,OUTPUT); // buzzer & LED (start with buzzer on)
digitalWrite(8,HIGH);
pinMode(13,OUTPUT); // LED built-in Arduino
digitalWrite(13,HIGH);
delay(50);
digitalWrite(8,LOW); // turn off buzzer
delay(5000); // wait for 5 seconds to shutdown the circuit
for(int i = 0;i<3;i++){
digitalWrite(8,HIGH);delay(80);digitalWrite(8,LOW);delay(600);
}; // beeps
digitalWrite(8,HIGH);delay(1000);digitalWrite(8,LOW);
digitalWrite(7,LOW); // shutdown the circuit
}
void loop()
{
}
My main power 5v in breadboard come at the top left.
The relay is different. My relay is this:
Problem is, when i click switch button in the breadboard, nothing happened.
Any help would be very appreciated.

Answer 1

The breadboards like yours usually have power rails separated in the middle. On a photo of your setup it looks like you connected your power supply to the upper half of the board, and reset of the circuit to the lower. Try connecting everything on the same half, or use jumpers to connect power rails.

Answer 2

Found the solution.
Change the digitalWrite from HIGH to LOW and LOW to HIGH for pin 7
void setup()
{
pinMode(7,OUTPUT); // Relay Signal Pin
digitalWrite(7,LOW); // <-- change this
...
...
digitalWrite(7,HIGH); // shutdown the circuit <-- change this too
}
void loop()
{
}
Hope this help others for having same relay.