Step 1.1: Setting up the project

Before writing any code, I had to build the basic parts of the project. I set up a new project in Tinkercad and added an Arduino, a small circuit board as well as two buttons and two resistors. I also connected them with the 5V panel of the Arduino to give the buttons a power supply.

Step 1.2: Adding LEDs

Now I added 4 LEDs and a resistor for each of them. I connected the to the pins 13-10 of the Arduino. As you can see I forgot tzo connect them to the Ground, I will fix this in a future step.

Step 1.3: Connecting the buttons

I connected the buttons to the pins 2 and 3.

Step 1.4: Starting with the code

Now that the project is set up I started writing the code. In the basic setup here I wrote some variables for each of the connected pins.

Step 1.5: Reading button inputs

I changed the loop function to constantly check for inputs from the two buttons.

Step 1.6: Implementing logic

I added a few if clauses, which change the lighted LEDs, based on the states of the buttons. The code is now finished.

// C++ code
//
const int led1 = 13;
const int led2 = 12;
const int led3 = 11;
const int led4 = 10;
const int btnPin1 = 3;
const int btnPin2 = 2;

int btnValue1 = 0;
int btnValue2 = 0;


void setup()
{
  pinMode(led1,  OUTPUT);
  pinMode(led2,  OUTPUT);
  pinMode(led3,  OUTPUT);
  pinMode(led4,  OUTPUT);
}

void loop()
{
	btnValue1 = digitalRead(btnPin1);
  	btnValue2 = digitalRead(btnPin2);
  
  
  
  if(btnValue1 == LOW){
  	digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW);
  } 
  else{
  	digitalWrite(led2, HIGH);
	digitalWrite(led1, LOW);
  } 
  if(btnValue2 == LOW) {
    digitalWrite(led3, HIGH);
    digitalWrite(led4, LOW);
  }
  else{
    digitalWrite(led3, LOW);
	digitalWrite(led4, HIGH);
  }
}
                    

Step 1.7: Final Result

The two buttons now control all of the LEDs.