Materials Needed

1. Arduino Uno R3 with cable.
2. 1x Breadboard Solderless.
3. 3x LED.
4. 5x Pushbutton.
5. 9x 220 ohm resistor.
6. 13x Jumper.

To learn more details

Simple Programming Example

//LearnIoT Academy
//Multiple Pushbuttons
//any buttons light up LED

int buttonPin = A0;     //Button and LED pin numbers
int ledGreen = 2;
int ledRed = 3;
int ledYellow = 4;


void setup() 
{
    pinMode(ledGreen, OUTPUT);    //Define LED pins
    pinMode(ledRed, OUTPUT);
    pinMode(ledYellow, OUTPUT);
    Serial.begin(9600);           //Serial monitor used to determine limit values
}

void loop() {
  int temp = analogRead(buttonPin);   //Read the analogue input
  Serial.println(temp);               //Display the read value in the Serial monitor
  if (temp < 100)                     //Lower limit for first button - if below this limit then no button is pushed and LEDs are turned off
  {
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow, LOW);
  }
  else if (temp < 130)                //First button limit - if below this limit but above previous limit then the first button is pressed
  {
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledYellow, HIGH);
  }
    else if (temp < 160)                //First & Second button limit - if below this limit but above previous limit then the first & second button is pressed
  {
    digitalWrite(ledGreen, HIGH);
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledYellow, HIGH);
  }

  else if (temp < 250)                //Second button limit
  {
    digitalWrite(ledGreen, HIGH);
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledYellow, LOW);
  }
  else if (temp < 350)                //Third button limit
  {
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow, HIGH);
  }
  else if (temp < 850)                //Fourth button limit
  {
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledYellow, LOW);
  }
  else                                //If none of the previous buttons are pressed, then the fifth button must be pressed
  {
    digitalWrite(ledGreen, HIGH);
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow, LOW);
  }
  delay(100);                         //Delay for stability
}
            

Below is a reference image for the wiring of the multiple push buttons: