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Active Buzzer Module 3V/5V/12V — Magnetic Continuous Beep, Arduino (5-Pack)
Active Buzzer Module 3V/5V/12V Magnetic Continuous Beep, Arduino (5-Pack)
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Active Buzzer Module — 3V / 5V / 12V, Magnetic Continuous Beep, Arduino (5-Pack)
An active buzzer contains a built-in oscillator circuit that generates a fixed-frequency tone when DC voltage is applied — no PWM or frequency signal required from the MCU. Simply drive the signal pin HIGH from any Arduino GPIO to produce a continuous beep. Available in 3V, 5V, and 12V operating voltages.
Key Specifications
| Parameter | Value |
|---|---|
| Type | Active (self-oscillating, built-in driver) |
| Operating Voltage | 3V / 5V / 12V (select variant) |
| Operating Current | ~30mA @ 5V |
| Sound Frequency | ~2300Hz (fixed, internal oscillator) |
| Sound Pressure Level (SPL) | >85dB @ 10cm |
| Control | Digital HIGH/LOW (active-HIGH or active-LOW per module) |
| Connector | 3-pin header (VCC, GND, I/O) |
| Module Size | ~33 × 13mm |
| Quantity | 5 pieces |
Active vs Passive Buzzer — Key Difference
| Feature | Active Buzzer (This Product) | Passive Buzzer |
|---|---|---|
| Internal Oscillator | Yes — fixed frequency | No — requires PWM input |
| Control Signal | DC HIGH/LOW | PWM (tone() function) |
| Tone Variety | Single fixed tone | Any frequency (music, melodies) |
| Arduino Code | digitalWrite(pin, HIGH) | tone(pin, frequency) |
| Best For | Alarms, notifications, simple beeps | Music, melodies, variable tones |
Why Choose Active Buzzer Module?
- No PWM Required — Simple digitalWrite(HIGH) produces immediate beep; ideal for beginners
- Built-in Driver Transistor — Module includes NPN transistor; drives buzzer directly from 3.3V/5V GPIO without current concerns
- >85dB SPL — Audible alarm in noisy environments
- 3-Pin Interface — VCC, GND, I/O; plug-and-play with Arduino sensor shields
- 5-Pack Value — Spares for multiple projects or replacement stock
Typical Applications
- Arduino alarm system (motion sensor + buzzer)
- Doorbell and entry notification
- Low battery warning indicator
- Button press audio feedback
- Timer and countdown completion alert
- Error and fault notification in embedded systems
Arduino Example
Connect VCC to 5V, GND to GND, I/O to Arduino pin 8.pinMode(8, OUTPUT);digitalWrite(8, HIGH); // Buzzer ONdelay(500);digitalWrite(8, LOW); // Buzzer OFF
FAQ
Q: How do I know if my buzzer is active or passive?
A: Apply 3V–5V DC directly to the buzzer terminals. If it beeps continuously — it’s active. If silent — it’s passive (requires AC/PWM signal).
Q: Can active buzzer play melodies?
A: No — active buzzers produce only one fixed frequency (~2300Hz). For melodies and variable tones, use a passive buzzer with Arduino’s tone() function.
Package Contents
- 5× Active Buzzer Module (3V / 5V / 12V — per selected variant)
