arduino nano control with digital pin as switch button and another one pin as control on led or relay this is connection as simple and easy

Arduino nano button control on led 

This code does the following:

- Sets pin 12 as the switch input

- Sets pin 13 as the LED output

- Toggles the LED on/off each time the switch is pressed

- Allows continuous cycling of the LED state

- Provides a simple on/off mechanism with each button press

To use this:

1. Open Arduino IDE

2. Copy and paste this code

3. Upload to an Arduino Nano

4. Connect a switch to pin 12 and an LED to pin 13

Key features:

- Uses INPUT_PULLUP to simplify switch wiring

- Implements a simple state toggle mechanism

- Includes a small delay to prevent switch bounce

- Works in a continuous loop, ready to be triggered multiple times

Digital writer Suresh

const int switchPin = 12;  // Define switch pin as pin 12
const int ledPin = 13;     // Define LED pin as pin 13

int switchState = 0;       // Variable to store switch state
bool isLedOn = false;      // Variable to track LED state

void setup() {
  pinMode(switchPin, INPUT_PULLUP);  // Set switch pin as input with pull-up resistor
  pinMode(ledPin, OUTPUT);           // Set LED pin as output
}

void loop() {
  // Read the current state of the switch
  int reading = digitalRead(switchPin);
  
  // Check if switch is pressed (LOW indicates switch is pressed)
  if (reading == LOW) {
    // Toggle LED state
    isLedOn = !isLedOn;
    
    if (isLedOn) {
      digitalWrite(ledPin, HIGH);  // Turn on the LED
    } else {
      digitalWrite(ledPin, LOW);   // Turn off the LED
    }
    
    // Delay to prevent multiple triggers from a single press
    delay(250);
  }
}

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