Active Buzzer 3V/5V — 5-Piece Pack

The Active Buzzer 3V/5V (5PCS) is the simplest way to add sound to your project. An active buzzer contains a built-in oscillator, so you just apply DC voltage and it beeps — no frequency generation needed from your microcontroller. Ideal for alarms, button feedback, timer alerts, and notification sounds.

Active vs passive buzzers

Type	How it works	Pros	Cons
Active (this)	Built-in oscillator — apply voltage and it beeps	Simple, one fixed tone	Can't change frequency
Passive / Piezo	Needs external frequency signal (PWM)	Play melodies, variable tones	Requires PWM from MCU