Now that we have assembled the relay controller, we will build the Arduino sketch to make the circuit do as we like. We will create the sketch in such a way that it will be able to control the relay through the push button. To do so, you will need to follow the code given in these steps:
First, we will declare the relay and the button pins. The relay is pin 7, while the button is pin 8. To do this, follow the code:
int relayPin = 7; int buttonPin = 8;
Next, we will create variables for the button states:
int buttonState; int lastButtonState = LOW; int previousButtonState = LOW;
To debounce the button and achieve a stable state for the relay, we will add the following code. We will declare a default last debounce time and debounce delay:
long lastDebounceTime = 0; long debounceDelay = 50;
Then, we will create a variable for the state of the relay:
int relayState = LOW;
Inside the
setup()function of the sketch, we will set the pins for the relay and the button. The button...