digitalWrite(ledPin, LOW); // Turn LED OFF pinMode() initializes the LED as an output and button as an input. When the button is pressed, Digital Pin 2 reads LOW because the circuit is closed. Arduino sets Pin 13 HIGH, and the LED turns ON. When the button is released, Pin 2 reads HIGH , and the LED turns OFF.

digitalWrite (): Turns the LED ON (HIGH) or OFF (LOW). Once your circuit is set up and the code is uploaded to the Arduino: Press the button. The LED should light up. Release the button. The LED should turn off. Congratulations! You’ve just created your first interactive project. 1. Toggle the LED With the Button

When you press the button, it completes an electrical circuit. The Arduino detects this and sends a signal to turn the LED on. When the button is released, the circuit is broken, and the LED turns off. To ensure stable operation, a pull-down resistor is used. Without it, the button’s state could “float,” causing erratic behavior.

digitalWrite(ledPin, LOW); Replace “buttonPin” and “ledPin” with the actual numbers of the digital input and output pins that the pushbutton and LED are connected to. Upload the sketch to the Arduino board by clicking the “Upload” button in the Arduino software. Make connections according to the circuit diagram given below.