Arduino Push Button With Multiple LEDs Tutorial

This tutorial demonstrates how to use an Arduino Push Button with Multiple LEDs. The push button will toggle the LEDs on and off in a specific sequence. This is a great introduction to basic programming concepts and can be easily modified to create more complex LED sequences.

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Step 1: What You Will Need

Arduino UNO

Push Button

LEDs (Different Colors) 4

Resistors 220Ω -4

Resistors 10KΩ -1

Jumper Wires

Breadboard

Step 2: Circuit Diagram

Step 3: Circuit Construction

To set up the circuit, connect four LEDs to Arduino digital pins 8, 9, 10, and 11. Connect the anode (positive leg) of each LED to the respective digital pin, and connect the cathode (negative leg) of each LED to a 220 Ω resistor. Connect the other end of each resistor to the ground. Connect a push button to digital pin 13.

Step 4: Code Upload

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int ledPin[4] = {8, 9, 10, 11};
const int buttonPin = 13;
int buttonState = HIGH;
int pushCounter = 0;
int numberOfLED = 4;
void setup() {
  pinMode(buttonPin, INPUT);
  for (int i = 0; i <= 4; i++) {
    pinMode(ledPin[i], OUTPUT);
  }
}
void loop() {
  buttonState = digitalRead(buttonPin);
  if (buttonState == LOW) {
    for (int i = 0; i < numberOfLED; i++) {
      if (pushCounter % numberOfLED == i) {
        digitalWrite(ledPin[i], HIGH);
      }
      else {
        digitalWrite(ledPin[i], LOW);
      }
    }
    pushCounter++;
    delay(400);
  }
}