The Active Piezo Buzzer (5V to 12V) is the most reliable way to add audible alerts or feedback to your electronic projects. At Electrapac, we recommend this "active" buzzer for beginners and professionals alike because it is incredibly easy to use—simply apply power, and it sounds off.

Product Overview

Unlike passive buzzers that require a complex PWM signal to produce sound, this is an Active Buzzer. It features an internal oscillating circuit, meaning it generates its own consistent, high-pitched "beep" as soon as it receives a DC voltage between 5V and 12V. Its loud, clear tone is designed to be heard even in noisy environments.

Key Features for Electrapac Customers

• True Plug-and-Play: No coding for frequencies is required. Just connect the Red wire to Positive (+) and the Black wire to Negative (-) to trigger the alarm.

• Wide Voltage Range: Optimized to work perfectly with 5V Arduino logic, 9V batteries, or 12V automotive systems.

• High Decibel Output: Emits a piercing 85dB tone, making it ideal for safety alarms, countdown timers, or error notifications.

• Low Power Consumption: Drawing less than 30mA, it can be powered directly from most microcontroller digital pins without the need for an external transistor (though a transistor is recommended for 12V usage).

• Sealed Bottom: The epoxy-sealed base protects the internal components from moisture and dust, ensuring a long operational life.

Wiring & Usage Guide

For a quick setup from , follow these basic connection steps:

1. Arduino Connection (5V): Connect the Red wire to a Digital Pin (e.g., Pin 8) and the Black wire to GND. Use digitalWrite(8, HIGH); to start the sound.

2. Battery Connection (9V/12V): Connect directly to a battery via a switch.

3. Polarity Check: Note that this component is polarized. Reversing the wires will prevent the buzzer from sounding.

Primary Applications

• Security Systems: Audible door/window entry alerts or motion detector alarms.

• User Feedback: "Beep" confirmations for button presses on control panels or 3D printers.

• Diagnostic Alerts: Warning sounds for low battery levels or high-temperature sensors.

• Kitchen Timers: DIY egg timers or laboratory countdown alerts.

• PC Motherboards: Standard "Post Code" beeper for troubleshooting hardware.

Why Shop at Electrapac?

We source our Active Buzzers with high-quality piezo ceramics to ensure a consistent 2.3kHz frequency that doesn't "waver" or fade over time. Visit to find this buzzer, breadboards, and NPN transistors for high-voltage switching.