Arduino UNO: Buzzer Sounds with 3.3V and GND 🔋🎵
Level: Super Beginner – No code needed!
🧰 Components Required:
- 1 x Arduino UNO
- 1 x Buzzer (Piezo or simple)
- Breadboard
- Jumper Wires
🔌 Circuit Connection:
- Positive pin (+) of buzzer → connect to Arduino UNO 3.3V pin
- Negative pin (–) of buzzer → connect to GND pin on Arduino
✅ Important: This circuit works without uploading any code to Arduino. As soon as you power the Arduino (USB or battery), the buzzer will make a continuous sound.
📘 Explanation:
In this project, the buzzer is powered directly by the Arduino UNO’s 3.3V pin. When power is supplied, current flows into the buzzer, making it produce a buzzing sound immediately. This is the simplest way to test a buzzer without using any programming.