Arduino - Button With LED

Turns ON and OFF a light LED, when pressing a pushbutton.

• Arduino Uno
• LED
• Button
• 220 and 10k ohm resistors
• Wires
• Breadboard

1. LED attach to board
2. Resistor (220 ohm) connect to LED's long leg (+)
3. The wire connect to resistor empty leg
4. After that, same wire connect to digital pin from resistor
5. The wire connect to LED's short leg (-), after that same wire connect to ground

• The button attach to board
• 10k resistor connect to button leg
• The wire connect to resistor empty leg, after that same wire connect to ground
• The wire connect to button's other leg, after that same wire connect to +5V
• The yellow wire connect to button's top leg, after that connect to digital pin

const int ledPin = 2;

const int buttonPin = 4;

int buttonState = 0;

void setup() {

Serial.begin(9600);

pinMode(ledPin, OUTPUT);

pinMode(buttonPin, INPUT);

}

void loop() {

buttonState = digitalRead(buttonPin);

if (buttonState == HIGH) {

digitalWrite(ledPin, HIGH);

Serial.println("LED ON +++++++");

}
else {

digitalWrite(ledPin, LOW);

Serial.println("LED OFF -------");

}

}

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