Active buzzer Module pcb

FEATURES – ACTIVE BUZZER MODULE (PCB MOUNTED)

• Type: Active buzzer mounted on PCB.
• Operating voltage: 3.5 – 5.5 V.
• Current consumption: < 25 mA.
• Pins: 3 pins (VCC, GND, Signal).
• Buzzer dimensions: 1.9 × 1.3 × 0.1 cm (metal housing).
• Compatible with: Arduino, ESP32, ESP8266, Raspberry Pi, Micro:bit (3.3–5 V systems).
• Frequency: Fixed tone (no PWM required).

The active buzzer module is an electroacoustic transducer capable of generating a constant tone without requiring PWM from the microcontroller. It only needs power and a HIGH digital signal to start buzzing.

USES & APPLICATIONS

• Alarm and warning systems.
• Sound indicators in educational projects.
• Status indicators for robots and electronics modules.
• Timers and simple buzzers for reminders.
• DIY electronics and Arduino projects.
• Microcontrollers such as ESP32, Raspberry Pi and Micro:bit.

ADVANTAGES OF THE ACTIVE BUZZER

• ✔️ Does not require PWM — works with a simple ON/OFF signal.
• ✔️ Very easy to use for beginners.
• ✔️ Produces a clear, stable tone.
• ✔️ Ideal for fast prototyping and alerts.
• ✔️ Mounted on a durable PCB ready to plug and play.

PINOUT & CONNECTIONS

• VCC: 5 V (also works at 3.3 V).
• GND: Ground.
• S (Signal): Digital signal to activate/deactivate buzzing.

Since this is an active buzzer, it generates a fixed-frequency tone as soon as the signal pin receives a HIGH level.

HOW TO USE THIS ACTIVE BUZZER

1. Connect VCC to the 5V output of your board.
2. Connect GND to ground.
3. Connect the signal pin to any digital I/O pin.
4. Write HIGH to make it buzz, LOW to stop it.

Simple Arduino example:

digitalWrite(pin_buzzer, HIGH); // buzzer ON
digitalWrite(pin_buzzer, LOW);  // buzzer OFF

IMPORTANT CONSIDERATIONS

• This is an active buzzer: it plays a fixed tone, not melodies.
• For musical notes or variable tones, use a passive buzzer.
• Do not drive it directly from analog pins.
• On 3.3 V boards (Raspberry Pi), volume will be slightly lower.
• Avoid using it too close to the ear.

FAQ – FREQUENTLY ASKED QUESTIONS

Does this buzzer generate its own sound?
Yes. It only needs power and a HIGH digital signal.

Is it different from a passive buzzer?
Yes. The active buzzer has a built-in oscillator and produces a fixed tone. The passive buzzer needs a PWM signal to generate tones or melodies.

Is it compatible with Arduino?
✔️ Fully compatible and extremely easy to use.

Does it work with Raspberry Pi and ESP32?
✔️ Yes. Works at 3.3 V, though sound volume may be slightly lower.

Can I use it for alarms?
✔️ Yes. Perfect for alarms, alerts, warning tones and project indicators.

The ideal active buzzer for alarms, quick alerts and educational electronics projects.