The Buzzer Module for Arduino is a 5V active buzzer breakout that beeps on a HIGH signal. No tone() library needed, no frequency math — just drive the input pin HIGH and it sounds. LOW = silent. Used for alarms, button feedback, alert tones, countdown timers, and any project that needs an audible signal.

Active buzzer = internal oscillator. Drive it with any digital GPIO. Compatible with Arduino, ESP32, Raspberry Pi, and similar boards on 3.3–5V logic.

Why you'll love it

• One-pin trigger: drive HIGH = beep, LOW = silent. No PWM required.
• Pre-mounted breakout: S (signal), VCC, GND pins. Plug into a breadboard and go.
• 5V tolerant: works on 3.3V (quieter) and 5V (loudest).
• Onboard transistor switch: handles the buzzer current so the GPIO sees only signal load.
• Loud enough for room-scale alerts: ~85 dB at 10 cm.

What you can build

• Door / motion alarm — PIR sensor triggers buzzer on motion.
• Reverse-parking sensor — HC-SR04 + buzzer beeps faster as obstacle gets closer.
• Game-show timer — countdown beep on the last 3 seconds.
• Button click feedback — short chirp on each press.
• Low-battery / overheat alert — comparator or sensor crosses threshold, buzzer fires.

Wiring (Arduino UNO)

• VCC → 5V
• GND → GND
• S (signal) → D8 (or any digital pin)

Sample code

const int BUZZER = 8;

void setup() {
  pinMode(BUZZER, OUTPUT);
}

void loop() {
  digitalWrite(BUZZER, HIGH);
  delay(200);                 // beep 200 ms
  digitalWrite(BUZZER, LOW);
  delay(800);                 // silent 800 ms
}

Specifications

• Type: Active buzzer module (fixed-tone oscillator)
• Operating voltage: 3.3V – 5V DC
• Resonant frequency: ~2.3 kHz (fixed)
• Sound output: ~85 dB at 10 cm
• Current draw: ~25 mA at 5V
• Trigger: digital HIGH = sound, LOW = silent
• Onboard parts: piezo buzzer + NPN switching transistor + base resistor + power LED
• Interface pins: S (signal), VCC, GND
• Board size: ~33 × 16 mm
• Mounting: 1 fixing hole, 3mm

Compatibility

• Arduino UNO / Mega / Nano — works directly at 5V
• ESP32 / ESP8266 — works at 3.3V (slightly quieter)
• Raspberry Pi (GPIO) — works at 3.3V
• Micro:bit — works on output pins

What's in the box

• 1 × Buzzer Module (active, 5V, breakout PCB with S/VCC/GND header)
• Jumper wires and controller board sold separately