5V Active & Passive Buzzer 12×9.5mm – 10/20 Pack for Arduino

5V Mini Buzzer Module – Active & Passive, 12×9.5mm | 10 or 20 Pack

Whether you're building a security alarm, a project notification system, or experimenting with microcontrollers, these compact 5V buzzers deliver a clear, continuous beep tone right out of the box. Available in both Active (self-oscillating, no external signal needed) and Passive (tone-controlled via PWM signal) variants, this pack gives you the flexibility to tackle a wide range of electronics projects.

Designed to be compatible with popular microcontroller platforms including the ATmega328P (Arduino Uno/Nano), these mini magnetic buzzers are an essential addition to any maker's component kit.

Made in Mainland China.

Key Features

• Compact Form Factor: 12×9.5mm mini size — fits easily on breadboards and PCBs without taking up precious space.
• Active Buzzer: Produces a continuous beep tone automatically when 5V is applied — no additional coding or PWM signal required.
• Passive Buzzer: Driven by a PWM signal from your microcontroller, allowing you to program custom tones, melodies, and frequencies.
• 5V Operating Voltage: Directly compatible with 5V microcontroller boards including ATmega328P-based platforms (Arduino Uno, Nano, and more).
• Magnetic Long Continuous Beep: Generates a strong, audible alarm tone suited for notification and alert applications.
• Versatile Pack Sizes: Choose a 10-piece or 20-piece pack — ideal for prototyping, classroom projects, or stocking your component drawer.
• Plug-and-Play Wiring: Simple 2-pin connection makes integration into any circuit straightforward.

Specifications

• Type: Active Buzzer / Passive Buzzer
• Dimensions: 12mm × 9.5mm
• Operating Voltage: 5V DC
• Compatible With: ATmega328P, Arduino Uno, Arduino Nano, and other 5V microcontroller boards
• Pack Quantity: 10 pcs or 20 pcs
• Country of Origin: Mainland China

What's in the Box?

• 10 or 20 × Mini 5V Buzzers (Active or Passive, as selected)

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Frequently Asked Questions

Q: What is the difference between an active buzzer and a passive buzzer?

A: An active buzzer contains an internal oscillator and produces a continuous beep tone as soon as 5V is supplied — no programming or signal generation needed. A passive buzzer requires an external PWM signal from a microcontroller (such as the ATmega328P/Arduino) to produce sound, giving you full control over the frequency and tone.

Q: Are these buzzers compatible with Arduino?

A: Yes! These 5V mini buzzers are fully compatible with ATmega328P-based boards such as the Arduino Uno and Arduino Nano. The active buzzer can be driven directly from a digital output pin, while the passive buzzer works with the Arduino's tone() function or any PWM output.

Q: Can I use these buzzers on a breadboard?

A: Absolutely. The 12×9.5mm form factor and standard 2-pin through-hole leads are designed to fit standard breadboards and PCBs, making prototyping fast and easy.

Q: Why should I buy a 20-pack instead of a 10-pack?

A: If you're running a classroom, building multiple projects, or simply want spares on hand, the 20-pack offers better value per unit. These components are frequently used in alarm systems, timers, and notification circuits, so having extras is always handy.