Arduino and basic electronics

Complete the challenge

Start a new Arduino sketch and put this code into it:

void setup() {
    pinMode(3, OUTPUT);
    pinMode(2, INPUT_PULLUP);
}

void loop() {
    if (digitalRead(2) == LOW) {
        digitalWrite(3, HIGH);
    } else {
        digitalWrite(3, LOW);
    }
}

Upload it to your Arduino.

The buzzer is connected directly to a digital output.

One wire on the buzzer is labelled +. This wire goes to the digital output.

The other wire on the buzzer goes to GND.

The diagram below shows how to wire the buzzer, and also includes a button to make the buzzer sound.

Press the button. Did the buzzer make a noise?

Claim your achievement

I did it!

That’s fantastic!

Now claim your achievement.

Complete a claim slip. The code is E5 and the level is 1.

Activity E5 — Wiring a buzzer

Level 1 — Connect a buzzer to the Arduino

Complete the challenge

Claim your achievement